Does Lens size matter?

I have always worn glasses w/ rather large frames/lenses (Bifocals).
It seems the "style" now is much smaller frames and lenses. If I get
new frames that are smaller, will I notice any difference in my vision
or using the glasses. It would seem the the bifocal part would be very
small and it would not be easy to use.

Thanks for your thoughts
MT

 

I went from large lenses to small lenses and it does take getting used
to. But I believe that the eye is an adaptive organism, given time
you won't notice. Yep... you won't notice your eyes getting used to
the staircase myopia that glasses produce.

 

(Vile) wrote in

Funny to see who believes in minus lens-induced staircase myopia and who
doesn't.

DrG

 

Only those who've "seen" it. You're right, not everybody. Only those
who've been told by their OD, "Your lenses are not too strong. You'll adapt
in a few days." Sure enough, they do.

Cathy

 

Yup. They got what they asked for.

I imagine the greater amount of accommodative demand hands the new burden
off to axial length as soon as axial length will take it.

Cathy

 

Yes, but when accommodative demand is reduced with bifocals, it doesn't
seem to matter. Maybe you should stick with one of those new paradigms,
like off-axis blur.

DrG

 

Now I have to imagine someone saying his bifocal add is too strong? If it's
too strong for reading, then I imagine the greater amount of accommodative
demand hands the new burden off to axial length as soon as axial length will
take it.

Off-axis refraction is less than central refraction for the myope. The
off-axis overcorrection is worse.

Cathy

 

I profess not to understand what you are saying. Accommodation, thus far,
appears not to be the prime suspect.

DrG

 

Correct. Accommodation is not the prime suspect. Whether fully
accommodated or totally relaxed, the shape of the image coming past the
posterior surface of the crystalline lens has to match the shape of the
retina for there to be no blur. "One quarter less was blurry" for central
vision, but the elongated eye's peripheral vision will have hyperopic blur.
Bifocals only add to the peripheral confusion. The person "adapts" quickly,
but the retina will still take into account all the confusion as it reshapes
itself to the new visual input. The time spent on near vs. far and central
vs. peripheral, behind minus vs. plus vs. plano vs. nothing, influences the
retina as to what new shape to take and how to direct eye growth to support
the new shape.

Accommodation does not cause image shape to mismatch retina shape. It does
not cause blur, retinal reshaping, or eye growth. It merely takes up the
retina's slack, bringing into focus what it can as needed. With each new
pair of stronger lenses, off-axis blur increases, the patient adapts,
retinal reshaping continues, and the eye grows to match the retina's new
shape. Hyperopic defocus (the cause of accommodation) is the culprit, even
when central vision is not overcorrected.

Cathy

 

You speak too difficult.
Indeed you wear glasses and suffer form a serious imperfect sight
defect.
Only a strained mind can find interest in these long discussions,
futile.
When you will know how a cure can be accomplished by means of rest
methods and tricks, all this jargon will go down the drain.

But very few people are interested in getting a cure!