Vertex Distance of Contact lenses

 

 

Submitted by Eye on Mon, 07/22/2019 - 01:22
Country
United States
Age
20
Gender
Female
Did you perform any surgery for the eyes?
No
Do you suffer from pre-existing illnesses in the eye?
No
Do you suffer from any diseases in the body?
No
Do you use any eye drops?
No
Do you wear Contact lenses or Eyeglasses?

Eyeglasses

Question

 

 

Hi,

I’m looking to get contact lenses but can’t decide what the vertex distance should be.

Based on the Spectacle value for my left and right eye, is it possible for you to figure out the   Vertex distance.

Thanks

Answer

Thanks for your Question

Vertex distance is the distance between the back surface of the eyeglasses lens or contact lenses and the front surface of the cornea. The vertex distance for contact lenses is zero because the contact lenses are sitting directly on the cornea.

It is important for eyeglasses and also if you want to know the refractive power of contact lenses from eyeglasses for patients with high refractive power. It has no value for patients with low or mild refractive errors as yours.

Your refractive power at not that high, so you don't need to use the vertex distance to know the exact power of the contact lenses. You can use the same refractive power of your eyeglasses.

 

 

Vertex distance of contact lenses

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Hey,
I was wondering what you meant when you said “Your refractive power at not that high, so you don't need to use the vertex distance to know the exact power of the contact lenses. You can use the same refractive power of your eyeglasses.”

I’m still unsure what I should put for the vertical distance When converting my prescription?
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Profile picture for user Webeyeclinic.com
 

 

I meant that you don't need to convert your eyeglasses prescription to contact lens prescription as your refractive power are low so even if you convert the prescription, the result will be the same.

Use the same eyeglasses prescription for contact lens.
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