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Vision Correction for
Refractive Errors:
A refraction from an eye
care practitioner helps
determine the type and
degree of refractive error,
which may be addressed with
glasses, contacts, or
refractive surgery.
An eye care practitioner has
various methods of
determining refractive
errors in an eye, including
use of this phoropter fitted
with various lenses.
Eyeglass lenses and contact
lenses are fabricated with
precise curvatures that help
offset flaws in our eye's
optical system. These lenses
intercept and bend light
rays, such that they achieve
a more precise point of
focus on our eye's retina.
Many vision correction
surgeries such as LASIK also
aim to correct refractive
errors by changing the shape
of our eye's front surface
(cornea), so that light rays
are bent into a more
accurate point of focus.
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