photochromic glasses; transition lenses
Tone colorsmāmámǎmàma
Meanings
1 sense · 3 examplesnoun
photochromic eyeglasses; glasses with transition lenses that darken in sunlight
Technical term for eyeglasses containing photochromic lenses that automatically adjust their tint based on UV light intensity. Commonly used as a convenient alternative to carrying separate prescription sunglasses.
Tā他
dài戴
le了
yī一
fù副
biàn变
sè色
jìng镜
，
chū出
mén门
jiù就
bù不
yòng用
huàn换
tài太
yáng阳
jìng镜
le了
。
He wears photochromic glasses, so he doesn't need to switch to sunglasses when going outside.
Biàn变
sè色
jìng镜
zài在
shì室
nèi内
shì是
tòu透
míng明
de的
，
dào到
le了
shì室
wài外
yù遇
dào到
zǐ紫
wài外
xiàn线
jiù就
huì会
biàn变
àn暗
。
Transition lenses are transparent indoors but darken when exposed to UV rays outdoors.
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Zhè这
zhǒng种
biàn变
sè色
jìng镜
de的
biàn变
sè色
sù速
dù度
bǐ比
yǐ以
qián前
kuài快
duō多
le了
。
These photochromic lenses change tint much faster than previous models.