Presbyopia Contact Lens Choices?!


Question: Presbyopia Contact Lens Choices?
People who have presbyopia get reading glasses, bifocal glasses, progressive glasses, ... The choices have nothing to do with which eye is dominant, which eye is not. When it comes to contact lens, optometrists may consider different presription based on Dominant Eye and Non-dominant Eye. Why?

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Best Answer - Chosen by Voters

[Cyndi... ] if you think [Footprintz..] is barking up the wrong tree, why didn't you offer an answer?

Hmmm.. Dominant eye is not needed for glasses becuase... both eyes are doing the Same thing.
ie. For reading glasses, both eyes are focused for near (and distance is blurry)
for Bifocals and Progressives, both eyes, as they shift up and down the lens, will focus at the same distance away... ie.. at the top of the lens, both eyes are focussing far away, while the bottom of the lens, both eyes will focus clearly up close, there's no relative blur between the eyes.

Because both eyes will essentially get the same picture, then there's no need for dominance.

For CL's (in monovision or mono-multifocals)... each will be doing it's own job, 1 eye will see far clearly, but near things will be blurry. The other eye is opposite.. as in it will see near clearly, but far objects will be blurred.
So from this, it's best to have the DOMINANT eye as the one used for FAR vision.. so that it would be easier to walk around, drive..etc... (the brain will accept this better... ie..it's easier to suppress the non-dominant eye which sees distance things blurry)



That has to be considered when doing what is called " mono vision " where one eye is fit with the distance correction ( the dominant eye ) and the non dominant eye is fit with the reading correction.

The dominant eye is usually the better choice to give the full distance correction to...although that isn't always the case. The brain will usually accept the best,full distance correction in the dominant eye and ignore the central blur in the other non dominant eye easier than the other way around.

There is one brand of multifocal contacts that also requires a dominant and non dominant fitting , because the lenses are made that way also. The dominant lens has distance vision on center and reading at the edge, then the non dominant lens is made the opposite. They are the Proclear I believe.

Most multifocals don't require that distinction though , with both lenses being made the same way.

Optician



Footprintz, I believe Frank wants to know why optometrists don't take dominant and nondominant eyes into consideration for reading glasses?




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