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 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.