Yuav ua li cas xaiv looj tsom iav dub zoo?

Txhua leej txhua tus paub tias looj tsom iav dub ua kom yooj yim pom nyob rau hnub tshav ntuj, txawm nyob ntawm txoj kev lossis hauv dej. Txawm li cas los xij, American Academy of Ophthalmology hais tias hnav cov looj tsom iav kom zoo kuj tseem tuaj yeem muab kev tiv thaiv zoo tiv thaiv ultraviolet (UV) rays, uas tuaj yeem ua rau luv - thiab ntev - lub sij hawm qhov muag puas.

Cov no yog cov kev xav tseem ceeb tshaj plaws thaum yuav looj tsom iav dub los tiv thaiv koj lub qhov muag ntawm lub hnub:

1. Ib puas feem pua.

When shopping for sunglasses to protect your eyes, one of the most important things is a sticker or label that says they block 100 percent of UV rays. However, according to the Academy's 2014 National Sunshine Safety Survey, less than half of people who buy sunglasses are unable to check whether the lenses protect their eyes from UV rays.

2. Lub lens loj dua, qhov zoo dua.

Qhov ntau dua koj cov looj tsom iav dub muaj, lub hnub puas tsawg koj tuaj yeem ua rau koj ob lub qhov muag. Xav txog kev yuav cov tsom iav loj loj lossis cov iav qhwv ntsej muag, uas pab txo qis UV rays nkag mus rau koj ob lub qhov muag.

3. Cov lo ntsiab muag tsaus yog tsis muaj kev tiv thaiv zoo dua.

While very dark lenses may look cool, they don't necessarily block more UV rays.

4. Color doesn't matter.

Some sunglasses come with amber, green or grey lenses. They don't block more sunlight, but they increase contrast, which can be useful for athletes who play sports like baseball or golf. Polarized lenses cut glare, not UV rays.

5. Polarization reduces glare scattered from reflective surfaces such as water or pavement. This doesn't provide more sun protection, but can make driving or activities on the water safer or more enjoyable.

6. Tus nqi yuav tsum tsis yog qhov tseem ceeb.

Sunglasses don't need to cost a fortune to work well. Less expensive pairs marked with 100 percent UV blocking can be just as effective as more expensive options.