The Effect Of Tinted Lenses On Visual Acuity.

One variable that may influence acuity is now very popular fad of
placing tints or lens coatings on ophthalmic lenses for full time and
multi- purpose uses . Most times, a tinted lens is given for its cosmetic
appeal without regard to how that tint may change the visual environment of the person wearing it.
By reducing the illumination entering the eye with a tinted lens, could acuity problems arise as a person
performs daily tasks? Docs a cosmetic tint or a sunglass type tint ,
even affect visual pnrformancc at all? Obviously any affect a tint may
have may not be enough to show up on tests such as Snellen
acuity. What if instead of Snellen, a test was used where idenification
of a targetdepended only on the subtense of the visual angle and
is not affected by surrounding objects or clues. Such a test could depend on angular acuity only. Such a test would be able to pick up changes in acuity levels and will tints affect this.