Sunglasses for Hot, Sunny Climates: The Sun Belt and Southwest Guide (

Sunglasses for Hot, Sunny Climates: The Sun Belt and Southwest Guide

If you live in Phoenix, Tucson, Las Vegas, Miami, Houston, San Antonio, or anywhere across the US Sun Belt and Southwest desert, you live in one of the highest UV environments on Earth. Not just in the US — on Earth. The combination of low latitude, minimal cloud cover, dry desert air with low UV-scattering humidity, and relentless sunshine produces UV Index values that reach the extreme category (11+) regularly from April through September, and remain in the moderate-to-high range year-round.

This means your sunglass specification is different from what most general sunglass advice recommends. Category 2 is the all-conditions US default — but it is insufficient for sustained outdoor activity in Sun Belt and Southwest UV conditions. The lens category, tint, coating, and wearing habits appropriate for your climate are specific, and this guide covers all of them.

This is a C21 Geography & Climate supporting post. It links back to the cluster pillar atsunglasses by climate and geography: the complete US regional guide.

Quick Answer

Category 3 UV400 polarized for daily outdoor use in the Sun Belt and Southwest. Category 4 for extended summer outdoor activity at peak UV times (10am–2pm, April–September). Gray polarized for driving. Amber or copper polarized for outdoor recreation, hiking, and water activities. Anti-saltwater coating for all coastal Gulf Coast and Florida use. Year-round UV400 use — winter UV in Phoenix and Miami is still in the moderate range and is chronically underestimated.

•1. Why the Sun Belt and Southwest Are Different

•2. UV Index Data for Major Sun Belt and Southwest Cities

•3. The Dry Desert UV Amplifier: Why Arizona Is Different From Florida

•4. Year-Round UV: The Winter Underestimation Problem

•5. The Surface Reflection Factor in Hot Climates

•6. Category 3 vs Category 2: What Changes

•7. When to Use Category 4

•8. Tint Choice for Hot Climate Outdoor Use

•9. Driving in the Sun Belt: The Specific Commute Issues

•10. Coastal and Gulf Coast Specifications

•11. Anti-Saltwater Coating: Why It Matters on the Gulf Coast

•12. Hiking and Desert Recreation

•13. Outdoor Work in Extreme UV Climates

•14. Comparison Table

•15. Best For

•16. Common Mistakes

•17. Bottom Line

•18. FAQs

Part 1: Why the Sun Belt and Southwest Are Different

Three factors combine in the Sun Belt and Southwest to produce UV conditions that outpace the rest of the continental US:

•Low latitude:Phoenix sits at 33°N. Miami at 25°N. Las Vegas at 36°N. These latitudes place the sun significantly higher in the sky than northern US cities, meaning solar radiation passes through less atmosphere and arrives with less attenuation. Miami’s July noon sun angle is approximately 88 degrees — nearly directly overhead — compared to about 70 degrees in New York City.

• Low humidity in the Southwest desert:humidity creates water vapor and aerosol particles that scatter UV in the atmosphere, reducing what reaches the ground. The Sonoran Desert in Arizona and the Mojave in Nevada have some of the lowest humidity levels in the US, meaning minimal UV scattering. More of the solar UV arrives at the surface intact.

•High sunshine fraction:Phoenix averages approximately 299 sunny days per year — one of the highest in any US city. Miami averages approximately 248 sunny days. Unlike regions where cloud cover provides frequent UV reduction, Sun Belt and Southwest residents experience high UV on the majority of outdoor days throughout the year.

Part 2: UV Index Data for Major Sun Belt and Southwest Cities

City	Latitude	July Noon UV Index	January UV Index	Annual Sunny Days
Phoenix, AZ	33°N	11–13 (extreme)	4–5 (moderate)	~299
Tucson, AZ	32°N	11–13 (extreme)	4–5 (moderate)	~350
Las Vegas, NV	36°N	11–12 (extreme)	3–4 (moderate)	~294
Albuquerque, NM	35°N	10–11 (very high–extreme)	3–4 (moderate)	~278
El Paso, TX	31°N	11–12 (extreme)	4–5 (moderate)	~297
Miami, FL	25°N	10–11 (very high–extreme)	5–6 (moderate–high)	~248
Tampa, FL	27°N	10–11 (very high–extreme)	5–6 (moderate–high)	~233
Houston, TX	29°N	9–10 (very high)	3–4 (moderate)	~204
San Antonio, TX	29°N	9–10 (very high)	3–4 (moderate)	~220
New Orleans, LA	29°N	9–10 (very high)	3–4 (moderate)	~204

Part 3: The Dry Desert UV Amplifier — Why Arizona Is Different From Florida

Arizona and Florida share similar latitude ranges (25–35°N) but produce different UV profiles because of humidity. The Gulf of Mexico and Atlantic moisture that keeps Florida’s air humid provides a modest but real UV-scattering effect. Arizona and Nevada’s desert air has almost no comparable moisture.

The practical difference: at the same sun angle and latitude, Tucson in July produces UV Index 11–13 while Miami in July produces UV Index 10–11. Both are in the very high to extreme range, and both demand Cat 3 UV400 protection. But the additional UV in the desert environment means that Cat 3 at its darker end (closer to 8% VLT) is more appropriate for desert hiking and sustained outdoor activity than the lighter end of Cat 3 (18% VLT).

The other desert modifier is surface reflection. Desert sand and exposed rock surfaces reflect 15–25% of UV upward, adding reflected UV from below to direct UV from above. Hikers and outdoor workers in the desert receive direct UV plus reflected UV from the terrain surface simultaneously.

Part 4: Year-Round UV — The Winter Underestimation Problem

The most consistent UV protection error in Sun Belt and Southwest states is the winter underestimation problem. When temperatures drop to comfortable levels in November through February, many residents stop wearing sunglasses because it “doesn’t feel like summer.”

The UV Index data does not support this behavioral adjustment. Phoenix in January averages UV Index 4–5 on clear days. Miami in January averages UV Index 5–6. These values are in the moderate-to-high range where the WHO recommends UV eye protection. A Phoenix resident who wears UV400 from April through October but goes unprotected from November through March is missing four to five months of meaningful UV exposure.

The cumulative ocular UV dose from November through March at Phoenix UV Index 4–5 over 20 years of unprotected winter outdoor time is substantial. Cataract formation risk and AMD risk are cumulative — each unprotected outdoor session adds to a running lifetime total. Year-round UV400 use is the correct practice for all Sun Belt and Southwest residents, not just summer UV400 use.

Part 5: The Surface Reflection Factor in Hot Climates

Hot-climate environments produce specific high-UV surface reflection scenarios:

• Desert sand and rock:15–25% UV reflection. Desert hikers receive UV from above (direct) and from the surrounding terrain (reflected). The reflected UV component is significant in canyon environments where rock walls reflect UV laterally as well.

• Pool and patio concrete:concrete and light-colored pavement reflect 10–15% UV. Poolside outdoor time combines direct UV with reflection from the concrete surround and pool water surface. Children playing around pools in the Sun Belt are exposed to this reflection component during all outdoor pool time.

• Gulf of Mexico and Atlantic coastal water:average 5–15% UV reflection, higher at low sun angles. Beach and coastal outdoor time in Florida and Gulf Coast states adds the water reflection component to very high baseline UV.

• Car hood and surrounding vehicles:in the sprawling suburban parking lots of Phoenix and Las Vegas, the UV reflected from dozens of car hoods, windows, and white concrete parking surfaces can add a significant UV contribution for pedestrians.

Part 6: Category 3 vs Category 2 — What Changes

Category 2 lenses transmit 18–43% of visible light. Category 3 transmits 8–18%. The practical difference in Sun Belt and Southwest conditions:

Property	Category 2 (18–43% VLT)	Category 3 (8–18% VLT)
UV protection	Complete (UV400)	Complete (UV400)
Brightness reduction	Moderate — comfortable in moderate sun	Strong — appropriate for sustained high-UV conditions
Glare management	Good	Excellent — further reduces direct solar disk glare
Squinting load at UV Index 9–11	Reduced but some squinting likely	Comfortable — adequate for extreme UV conditions
Visual performance in high UV	Adequate	Better — reduced visual fatigue accumulation
Tunnel / shaded transition	Comfortable	Possible over-darkening in rapid light transitions
Best for Sun Belt use	Variable conditions; driving; cloudy days	Sustained outdoor use; hiking; beach; extended outdoor activity

The correct rotation for Sun Belt and Southwest residents: Cat 3 UV400 polarized as the primary outdoor pair for all sustained outdoor activity, with Cat 2 UV400 polarized for driving in mixed traffic and for the variable-light situations (outdoor dining, brief outdoor errands, transitional use) where Cat 3 may over-darken rapid transitions.

Part 7: When to Use Category 4

Category 4 lenses (3–8% VLT) are for the most extreme UV conditions. In the Sun Belt and Southwest context, these include:

•Extended mid-summer outdoor activity in peak UV windows:10am–2pm outdoor hiking, sports, or work in July and August in Phoenix or Tucson, when UV Index regularly reaches 12–13.

• Open desert or high-reflectance environments:white salt flats (Bonneville, UT; White Sands, NM), light-colored rock terrain, or reflective surfaces that add the reflected UV component to already-extreme direct UV.

• Extended outdoor water sports:kayaking or fishing in the desert sun on Lake Powell, Lake Mead, or the Gulf of Mexico in peak summer, where water reflection adds to direct UV.

Category 4 is specifically excluded from driving use in most jurisdictions because of its effect on perception of traffic signals and adaptation in variable light. Cat 4 should only be used in sustained open-outdoor high-UV contexts without rapid transitions to lower light environments.

Part 8: Tint Choice for Hot Climate Outdoor Use

Gray Polarized — The Urban and Driving Standard

Gray polarized UV400 Category 3 is the primary daily pair for Sun Belt and Southwest urban residents. The Phoenix metro area, Greater Miami, greater Houston, and the Las Vegas Valley are all driving-dependent environments where traffic signal color accuracy is the primary visual safety requirement. Gray’s neutral tint preserves traffic signal accuracy while Cat 3 darkness manages the extreme brightness of midday desert and Sun Belt conditions. Polarization eliminates the road surface reflection that dominates the driving glare environment.

Amber Polarized — Desert Recreation and Hiking

Amber polarized UV400 Category 3 is the desert recreation and hiking choice. Desert terrain — sandstone, sandy washes, scrubby vegetation — is a relatively low-contrast environment where amber’s blue-scatter filtering provides genuine contrast enhancement for trail features, rock surfaces, and hazard detection. The amber tint also enhances the reddish tones of canyon rock, providing a visually vivid and aesthetically appropriate view of desert landscapes.

Copper Polarized — Gulf Coast and Florida Water

Copper polarized UV400 Category 3 for Gulf Coast and Florida fishing, boating, and coastal activities. Copper’s wavelength transmission is specifically optimized for sub-surface water visibility — it reduces the surface reflection that obscures the water below while enhancing the contrast of features under the surface. For the extensive fishing and boating culture of Florida, the Gulf Coast, and the Intracoastal Waterway, copper polarized is the working lens.

Part 9: Driving in the Sun Belt — The Specific Commute Issues

The Sun Belt commute has specific UV and glare characteristics driven by the region’s built environment:

•Sprawling east-west highway corridors:I-10 from Jacksonville to Phoenix is one of the most UV-intensive driving corridors in North America. Dawn eastbound commuters on I-10 in Phoenix, Tucson, or El Paso face direct sunrise glare plus extreme desert UV. Dusk westbound commuters face the same in reverse.

• Glass and chrome-heavy built environment:the tall glass-tower office districts of downtown Miami, Houston, Phoenix, and Tampa create secondary glare sources from building facades that reflect intense desert and tropical sun across the street-level environment.

• Extensive concrete surfaces:the Sun Belt’s low-density suburban development produces vast parking lots and highway surfaces that reflect UV and visible light upward at pedestrians and drivers.

•Year-round construction exposure:the Sun Belt’s constant construction activity means outdoor workers, inspectors, and commuters are exposed to the UV reflection from exposed concrete, steel, and excavated earth surfaces year-round.

✨ NAVI EYEWEAR — CATEGORY 3 UV400 POLARIZED FOR EXTREME UV.

UV400 polycarbonate. Gray polarized Cat 3 for Sun Belt driving. Amber polarized for desert recreation.

Anti-saltwater coating for Gulf Coast and Florida coastal use. TR90. Stainless hinges.

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Part 10: Coastal and Gulf Coast Specifications

Florida and Gulf Coast residents face the combination of very high UV plus water surface reflection plus salt air. The specific requirements this combination creates:

• Category 3 minimum for beach and water activities:the combination of UV Index 9–11 direct plus water surface reflection adds meaningfully to total UV exposure. Cat 2 manages driving; Cat 3 is appropriate for beach and water outdoor time.

• Polarized for water surface glare:the primary visual discomfort in Gulf Coast and Florida outdoor environments is the horizontal water surface glare. Polarized lenses eliminate this specifically; non-polarized lenses of equivalent darkness only reduce its intensity proportionally.

• Anti-saltwater coating:essential for coastal use. Salt crystals from sea spray and salt air micro-droplets deposit on lens surfaces and erode coatings over time. Anti-saltwater coating (hydrophobic oleophobic coating designed to resist salt residue) extends lens life significantly in coastal environments.

Part 11: Anti-Saltwater Coating — Why It Matters on the Gulf Coast

Standard oleophobic coatings are designed to repel oil and finger smudges. They are not optimized for the salt-water environment of Gulf Coast and Florida coastal living. Repeated exposure to salt spray, salt air, and beach use without a specific anti-saltwater coating causes progressive coating degradation that produces haze, reduced optical clarity, and visible surface damage.

Anti-saltwater coating is a specific lens surface treatment that provides improved resistance to salt crystal deposition and the corrosive effect of salt water on coating adhesion. For any sunglass used regularly within a mile of the Gulf or Atlantic coastline — including beach walks, outdoor dining on the water, boating, fishing, kayaking, and coastal driving with windows down — anti-saltwater coating is appropriate protective investment.

Navi’s polarized lenses include anti-saltwater coating as a standard feature, making them appropriate for Gulf Coast and Florida coastal use without the coating degradation concerns that affect standard lenses in these environments.

Part 12: Hiking and Desert Recreation

Desert hiking and recreation in the Southwest presents some of the most demanding UV conditions for outdoor users:

• Peak summer risk (May–September):UV Index 11–13 at midday. Desert hikers face direct UV plus surface reflection from sand and rock, with no tree canopy providing shade for the UV overhead. Early morning (before 9am) and late afternoon (after 4pm) hiking reduces the UV exposure window significantly but does not eliminate it.

• Canyon environments:slot canyons and rock canyons add lateral UV reflection from the canyon walls. The total UV exposure in a canyon environment at midday can be higher than on open terrain because walls on multiple sides contribute reflected UV from different angles.

• Water crossings and desert lakes:desert river corridors (Colorado River through the Grand Canyon, Rio Grande in New Mexico) and desert reservoirs (Lake Havasu, Lake Mead, Lake Powell) add the water reflection component to direct desert UV.

• Specification:amber polarized UV400 Cat 3 for desert hiking. Wide-brow frame for additional overhead UV protection. Secure fit for the physical demands of technical terrain.

Part 13: Outdoor Work in Extreme UV Climates

The Sun Belt and Southwest have significant outdoor work populations: construction workers across Phoenix and Las Vegas metro growth corridors, agricultural workers across the Central Valley, Texas, and Florida, landscaping and maintenance workers, and outdoor sports and recreation staff in major resort markets.

For outdoor workers in these climates, the UV exposure is not recreational — it is occupational. A construction worker in Phoenix accumulates UV exposure across 8–10 hours of outdoor work daily, 5–6 days a week, over a working career. The lifetime cumulative UV dose from occupational outdoor work in the Southwest and Sun Belt is among the highest any occupational group accumulates.

UV400 Cat 3 polarized sunglasses for outdoor work in these climates are an occupational health intervention, not a personal comfort choice. Employers with outdoor work populations in the Sun Belt and Southwest providing UV400 Cat 3 eye protection as standard PPE is the evidence-based approach. The Navi four-pair purchase model at $30 per pair makes this accessible at any scale.

Part 14: Comparison Table — Sun Belt and Southwest Scenarios

Scenario	UV Risk	Recommended Lens	Key Feature
Phoenix/Tucson summer hiking	Extreme (UV 11–13 + sand reflection)	Amber polarized Cat 3	Contrast enhancement + maximum UV darkness
Miami/Tampa beach outdoor	Very high (UV 10–11 + water reflection)	Gray or copper polarized Cat 3	Glare elimination + anti-saltwater coating
Sun Belt daily driving (commute)	High to very high	Gray polarized Cat 3	Color accuracy + road surface glare elimination
Las Vegas outdoor summer	Extreme (UV 11–12, desert + urban reflection)	Gray polarized Cat 3	Maximum brightness management
Gulf Coast fishing / boating	Very high + water reflection	Copper polarized Cat 3	Sub-surface visibility + anti-saltwater
Desert canyon hiking (Grand Canyon)	Extreme + lateral wall reflection	Amber polarized Cat 3–4	Maximum UV + contrast for terrain
Phoenix winter outdoor	Moderate (UV 4–5)	Gray or amber polarized Cat 2	Still requires UV400; Cat 2 adequate
Gulf Coast driving (daily)	High to very high	Gray polarized Cat 2–3	Color accuracy + wet/humid road glare
Outdoor construction work (SW)	Extreme occupational	Any UV400 Cat 3	Occupational UV protection minimum
Florida Keys / open water sailing	Very high + extreme water reflection	Copper or gray polarized Cat 3–4	Sub-surface + maximum glare elimination

Part 15: Best For

Gray Polarized UV400 Category 3 — Best For:

•Sun Belt urban commuters and daily drivers across Phoenix, Miami, Houston, Las Vegas, and Tampa

•Year-round daily outdoor use across the Southwest for residents who spend time outdoors in the high-UV window

•Professional outdoor workers in urban and suburban construction, landscaping, and outdoor service roles

Amber Polarized UV400 Category 3 — Best For:

•Desert hikers and outdoor recreation users across Arizona, New Mexico, Nevada, and the Colorado Plateau

•Outdoor workers in open-terrain environments where contrast enhancement is as important as UV management

Copper Polarized UV400 Category 3 — Best For:

•Gulf Coast and Florida fishers, boaters, and water recreationists who need sub-surface water visibility alongside maximum UV protection

•Florida Keys, Tampa Bay, Galveston, and other shallow coastal water environments

Part 16: Common Mistakes

• Using Category 2 for sustained desert outdoor activity:Cat 2’s 18–43% VLT is insufficient for sustained outdoor activity at UV Index 11+. Squinting persists, visual fatigue accumulates faster, and UV protection — though technically complete at UV400 — is accompanied by greater visual discomfort than Cat 3 provides.

• Stopping UV400 use in winter because ‘it’s not hot’:Phoenix and Miami January UV Index is 4–6, firmly in the moderate-to-high range. Year-round UV400 use is the correct protocol for Sun Belt residents.

•Not using polarized lenses in coastal environments:the Gulf Coast and Florida Atlantic coastal glare is predominantly horizontally polarized water surface reflection. Non-polarized Cat 3 lenses dim the glare proportionally; polarized lenses eliminate it. The difference is dramatic for fishing, driving near water, and beach use.

•Using standard lenses without anti-saltwater coating in coastal Florida and Gulf Coast:salt air and sea spray degrade standard coating within months of regular coastal use. Anti-saltwater coating is the minimum protection for lenses used within regular proximity to the Gulf or Atlantic.

• Using Cat 4 for driving:Category 4 is not appropriate for driving in any condition. Cat 3 is the maximum appropriate driving lens. Use Cat 4 only for sustained open-outdoor high-UV contexts without traffic.

Bottom Line

The Sun Belt and Southwest are not general sunglass environments. They are extreme UV environments that demand a specific, upgraded specification: Category 3 UV400 polarized for daily outdoor use, with Category 4 for peak summer outdoor activity, anti-saltwater coating for all coastal Gulf Coast and Florida use, and year-round wearing habits that do not suspend UV protection because winter temperatures are pleasant.

The two-pair rotation that covers the Sun Belt and Southwest resident:gray polarized UV400 Cat 3 for driving and urban daily use, amber polarized UV400 Cat 3 for desert recreation and outdoor activity. The Navi four-pair $119 purchase accommodates this rotation and provides backup pairs for the high-use outdoor lifestyle of Sun Belt and Southwest residents.

Browse UV400 polarized options atnavieyewear.com/collections/polarized. Add 4 pairs — Buy 1, Get Any 3 Free auto-applies. Free shipping. Free replacements.

Frequently Asked Questions

What lens category do I need in Arizona or Nevada?

Category 3 UV400 polarized for most outdoor use. Arizona and Nevada regularly reach UV Index 11–13 in summer — the extreme category. Category 2 is inadequate for sustained outdoor activity at these UV levels. Year-round UV400 use is appropriate since winter UV Index still reaches 4–5 in Phoenix and Las Vegas.

Do I need sunglasses year-round in Florida?

Yes. Florida’s UV Index reaches 10–11 in summer and remains at 5–6 even in January. UV Index 5–6 in January is in the moderate-to-high range where the WHO recommends eye protection. Florida residents who stop wearing UV400 in winter are missing months of meaningful UV exposure accumulation. Year-round Category 2–3 UV400 use is the correct protocol.

What is the best sunglass tint for desert hiking?

Amber polarized UV400 Category 3. Amber’s blue-scatter filtering enhances the contrast of desert terrain features against sand and rock backgrounds, improving trail legibility and hazard detection. Category 3 provides adequate darkness for the extreme UV Index of desert midday conditions. Polarization eliminates surface glare from sand, rock, and water.

Why do I need anti-saltwater coating for Gulf Coast sunglasses?

Salt spray and salt air deposit salt crystals on lens surfaces that progressively erode standard coatings over time. Anti-saltwater coating provides improved resistance to this erosion, extending optical clarity and lens life for coastal regular use. Without it, standard lenses used near the Gulf of Mexico or Atlantic coast degrade noticeably within a season of regular outdoor use.

What sunglasses should I use for driving in Phoenix or Miami?

Gray polarized UV400 Category 3. Gray for traffic signal color accuracy (essential in sprawling metro environments). Polarized for road surface glare elimination. Category 3 for the extreme brightness of desert and tropical sun conditions. The Sun Belt driving environment is one of the highest UV-load driving contexts in the US.

Should I use Category 4 sunglasses in the Southwest?

Category 4 is appropriate for extended outdoor non-driving activity in peak summer UV (10am–2pm, July–August) in desert environments. Not appropriate for driving, tunnel entry, or any activity with rapid light-level transitions. Most Sun Belt and Southwest residents are adequately served by Cat 3 for most conditions, using Cat 4 selectively for peak-UV sustained outdoor activity.

How does humidity affect sunglasses needs in Texas vs Arizona?

Texas Gulf Coast humidity provides modest UV scattering versus the dry desert of Arizona, resulting in slightly lower UV Index at the same latitude (Houston UV Index 9–10 vs Phoenix 11–13 in July). Both are in the very-high-to-extreme range requiring Cat 3 UV400. The practical difference: Arizona desert demands year-round Cat 3 for any sustained outdoor activity; Gulf Coast Texas may use Cat 2 for overcast days and moderate conditions more comfortably.

Do children need different sunglasses in high-UV climates?

Children in Sun Belt and Southwest climates face the same UV environment as adults but with greater vulnerability: children’s crystalline lenses transmit more UV to the retina than adult lenses. UV400 Cat 2–3 sunglasses for children in high-UV climates are the appropriate daily outdoor standard. The WHO estimates that up to 80% of lifetime ocular UV accumulates before age 18, making childhood UV protection in high-UV climates specifically important.

Supporting Articles

•Sunglasses by Climate and Geography: The Complete US Regional Guide

•Sunglasses for Tropical Travel: Caribbean, Mexico and Hawaii

•High Altitude Sunglasses: UV, Snow and Mountain Conditions

•Do You Need Sunglasses on Overcast Days? The UV Science

•Sunglasses for Truck Drivers and Long-Haul Drivers

•Best Sunglasses for Surfers: UV, Salt and Wave Performance

•UV and Eye Disease: The Complete Guide

•The Complete Guide to Sunglasses for Outdoor Workers

•Navi Eyewear UV400 Polarized Sunglasses Collection

CATEGORY 3 UV400. BUILT FOR EXTREME SUN.

UV400 polycarbonate. Gray polarized Cat 3 for driving. Amber for desert recreation.

Anti-saltwater coating for Gulf Coast and Florida coastal use.

Buy 1, Get Any 3 Pairs Free — $119 for four pairs. Free shipping. Free replacements.

Shop now:navieyewear.com/collections/polarized

SOURCES & CITATIONS

[1] World Health Organization.“Global solar UV index: a practical guide.”WHO/SDE/OEH/02.2, 2002.View source

[2] National Oceanic and Atmospheric Administration.“UV index forecast by location.”NOAA Weather Service, 2024.View source

[3] Taylor HR, West SK, Rosenthal FS, et al..“Effect of ultraviolet radiation on cataract formation.”New England Journal of Medicine, 1988.View source

[4] Sliney DH.“UV radiation ocular exposure dosimetry.”Documenta Ophthalmologica, 1994.View source

[5] Dain SJ.“Sunglasses and sunglass standards.”Clinical and Experimental Optometry, 2003.View source

[6] American Academy of Ophthalmology.“Sunglasses: choosing the right pair for UV protection.”AAO EyeSmart, 2023.View source

Sunglasses for Hot, Sunny Climates: The Sun Belt and Southwest Guide (2025)

Sunglasses for Hot, Sunny Climates: The Sun Belt and Southwest Guide (2025)