Assistance by younger family members could further increase screening options for the elderly. We need to study the Challenge under real conditions - using the variety of PC's, monitors used at home, with the added variables of home PC screening. Nevertheless the Challenge has shown great potential in detecting small nasal steppes and even early diabetic macular edema, and may be a sensitive means to overcome the disparity between in-office testing and lack of effective screening options. The stimulus size remains constant. Missed points are retested at higher increments of color contrast.
Compliance is monitored, and a simple age-matched analysis performed.
More data is needed, with phase 1 for that purpose. Phase 2 will use a modified version adjusted with a best fit data match provided by regression analysis. Doctor Name Practice Address 1 . . Dr. Gerald Horn, developer of the Challenge, is a Chicago ophthalmologist in private practice for eighteen years.