Help with glasses for 5yr old ?!

Question: Help with glasses for 5yr old ?

My 5yr old needs glasses and unfortunatly has a very strong prescription a +8 prescription in both eyes. I expressed concerns to the dr. About the "bugeye" effect that this is gonna cause and told him I would do anything to help minimize that as much as possible, he recommended a hi-index lens. I've been price shopping and have discovered that none of the regular optical outlets will sell me hi-index for my child because he's a kid and they aren't considered shatter resistant. I am going to buy the insurance on the glasses so replacemtent isn't a concern but just how non shatter resistant is a hi index lens? I inderstand they may chip but that's what the insurance is for and so they won't survive a garbage truck rolling over them like polycarbonit would. I'm confused and need some info regarding these 2 materials and this perscription for my son.

Answers:

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They are all afraid of getting their butts sued off if something should happen , but they are being ridiculous.

Polycarbonate would be a terrible choice in a power that high. The optics of poly are terrible once you get over a +/- 3.00

They are under estimating the strength of a high index lens. A + 8.00 , even in a lens that small WOULD still be thick enough to withstand a garbage truck rolling over them as you say.

Regular lenses have an index of 1.50 , then there is Trivex, an excellent material, better than Poly, but it is only 1.53, so it is thicker than Poly....then there is 1.56 mid High index, which is good up to +/- 4.00 ( approx)...then poly at 1.58 , but is full of chromatic aberrations and poor optical clarity in powers over + 3.00 , then 1.6 High Index , great up to about 6 diopters...then in a power like + 8.00 he should be in a 1.67 Aspheric high index lens, which has flatter front curves than a non aspheric lens, reducing the magnification of the eyes to some extent.

It would still be thick enough to be very safe. It would never break.

Being as your Dr. prescribed High index, it looks like you will have to get them from him , even if they are more expensive , if no one else will do it.

It doesn't make sense to go with anything less than a high index with a power that high.

Good luck with that.

Optician

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Help with glasses for 5yr old ?!

Best Answer - Chosen by Voters

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