Is it possible to determine my visual acuity from my contact lens prescription?
It is possible to guess what your visual acuity would be like without contact lenses (for example, I could guess a person with a -1.00 D contact lens would see about 20/40 when not wearing lenses). Actual Visual Acuity though depends on a number of factors that are not contained within a contact lens prescription such as clarity of the tissue, optical aberrations, photoreceptor spacing, lens clarity, absence or presence of lens opacities, vitreous clarity, health of the retina, etc. The contact lens prescription only contains information about the contact lens that is being used to correct the patients vision. It contains no actual information about the patient’s eye.
