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Q&A

Posts tagged optics

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25%
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Q&A Why can these Single Vision lenses slow myopia for kids, but not adults? [closed]

These WorldFamous companies advertise that their lenses can control myopia for kids, NOT adults. But none of these lenses are approved by FDA. I asked my optometrist why merely kids, not adults. Bu...

1 answer  ·  posted 7mo ago by TextKit‭  ·  closed 7mo ago by Mithical‭

Question optics
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Q&A Optically, why are circular eyeglasses lenses better than rectangular?

My optometrist said that round eyeglass lenses are OPTICALLY better than rectangular, particularly to correct myopia. He was NOT referring to fashion or style. I couldn't understand his explanatio...

1 answer  ·  posted 8mo ago by TextKit‭  ·  edited 7mo ago by TextKit‭

Question optics
60%
+1 −0
Q&A Conductivity with angle of light

In the lab I changed the angle the light hits a photoresistor and it doesnt obey Lambert's cosine law the conductivity of the photoresistor drops fast from +-20 to +-30 degrees angle.Why?

1 answer  ·  posted 1y ago by MissMulan‭  ·  last activity 1y ago by Olin Lathrop‭

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