Comprehensive Evaluation of Visual Function

The purpose of the research is to study the level of visual functioning in individuals with
various eye conditions when using different types of eyeglass lenses. Therefore, the goal of
this study is to determine factors that may account for variability in the visual
functioning of individuals with a range of refractive errors and their ability to perform
everyday activities when equipped with different types of lenses. We hypothesize that the
subjects will perform visual tasks of function better when using iZon™ Wavefront-Guided
Glasses than with conventional glasses. This hypothesis is based upon the glasses yielding
better visual acuity and because the design of the glasses reduces the effects of glare.
This research is important so that alternate treatments and vision correction may be
implemented which will have a more beneficial impact on those with refractive errors and
visual impairment.

Inclusion Criteria:

- Have normal vision

- Are far-sighted or near-sighted

- Have no eye diseases Subjects aged 18 and over, who have refractive errors ranging
from +5.0 to -5.0 and/or who have eye disease will be included in the study.