Vision Measured by the Vimetrics CVA Compared With Chart Testing Under Similar Luminance and Contrast Conditions

Inclusion Criteria

• •For inclusion in the normal group an eye would have an ocular examination within three months that, in the least, included the following:
• •A visual acuity measured of 20/30 or better for which on examination the refractive error alone is determined to define the vision.
• •For individuals 65 years or greater, lens nuclear opalescence and brunescence that is less than or equal to NO3, NC3 according to the LOCS III grading system.
• •For individuals less than 65 years, lens nuclear opalescence and brunescence that is less than or equal to NO2, NC2, according to the LOCS III grading system.
• •Persons without systemic disease that would interfere with vision will be enrolled. Such diseases that would exclude a subject from this category would include diabetes, and other systemic diseases such as neurological disorders that the examiner determines may interfere with the vision of an eye.
• •For inclusion an eye would have had an ocular examination within three months as per the stated protocol.
• •A visual acuity worse than 20/30. The determination on examination by the examiner that the lens opacity alone defines the vision. For individuals less than age 65 the nuclear cataract will be denser than NO2, NC2 or contain other components (posterior cortical or posterior sub capsular) that will be documented. For individuals 65 years of age or older, the nuclear cataract will be greater than NO3, NC3 or contain other components that define the vision.
• •It is recognized that many individuals within this group will have diabetes or hypertension that may be the cause of the maculopathy or aggravate the maculopathy. However, such systemic diseases will not necessarily exclude such persons, unless the examiner determines that such diseases cause reduced vision in the eye that is not defined by the maculopathy.
• •For inclusion an eye would have had an ocular examination within three months with components according to the protocol as stated.
• •A visual acuity with chart testing worse than 20/30 for which on examination the maculopathy alone is determined to define the vision.