1. Contrast thresholds for letter identification in retinitis pigmentosa;Alexander;Investigative Ophthalmology and Visual Science,1992
2. Visual acuity vs letter contrast sensitivity in retinitis pigmentosa;Alexander;Vision Research,1995
3. Motion coherence and spatial displacement thresholds in patients with retinitis pigmentosa;Alexander;Investigative Ophthalmology and Visual Science (Suppl),1997
4. Acuity-luminance functions and foveal increment thresholds in retinitis pigmentosa;Alexander;Investigative Ophthalmology and Visual Science,1991
5. Grating, vernier, and letter acuity in retinitis pigmentosa;Alexander;Investigative Ophthalmology and Visual Science,1992