Okay what would be the differnce between the BC 8.6 and BC 8.7, DIA 13.8 and DIA 14.0, and PWR -3.50- PWR -5.25. what i;m asking if i went from the -5.25 to the -3.50, how would affect my vision. also would such slight differnce int he other's really matter? well i was just wonderinf, mine was the 5.25 so how would it change?
2007-11-28 05:42:47 · 5 answers · asked by ? 1 in Health ➔ Optical
I am not sure I understand your question. If your eyes changed from -5.25 to -3.50 by themselves that is fine (your eyes naturally change as you age). But if your prescription is -5.25 and you are going to wear -3.50 you will not see well. It might seem like a slight difference but if you do it, you will see it is not. Your DIA should stay the same.
2007-11-28 05:52:37 · answer #1 · answered by jellybelly 4 · 0⤊ 0⤋
There is actually no difference between an 8.6 base curve, and an 8.7
Every base curve covers 1 /10 th either way...up or down
So, an 8.6 will fit the same as an 8.5 or 8.7
An 8.7 will fit the same as an 8.6 or 8.8
The diameter from 13.8 to 14.0 usually won't make a difference in the fit either.
But, you can't go from a - 5.25 to a - 3.50 in the power and still be able to see. Unless you have had an exam, and that is what the new prescription is...but if you are just thinking of changing that because someone is giving them to you, it won't work.
Sorry, it's hard to understand your question.
2007-11-28 10:11:08 · answer #2 · answered by Footprintz 7 · 0⤊ 0⤋
PWR is the strenght of the lense - if you need -5.25 (the - means you are nearsighted/can't see well far away) the -3.5 will improve your vision from if you aren't wearing any contacts, but not very well. The further away from 0 means stronger prescription.
BC has to do with the curve of your cornea - your dr will figure this out
DIA is the size of your contact lense from one edge to the other - again your dr will be able to tell you what size you need to properly fit your eye.
Hope this helps. If your eye changed from -5.25 to -3.5, then your vision improved
2007-11-28 05:57:23 · answer #3 · answered by lilhoot 3 · 0⤊ 0⤋
I put on touch lenses throughout the day and glasses the first thing within the morning and at night time.My eye health care professional instructed me that dressed in glasses,even a bit of bit,is well for the eyes on account that they get endeavor.
2016-09-05 16:06:09 · answer #4 · answered by Anonymous · 0⤊ 0⤋
They are just different types
Could be better could be worse.
I had to try many before i found the right one
2007-11-28 05:50:24 · answer #5 · answered by :( 3 · 0⤊ 0⤋