Fig. 12. Results of normal subjects looking through progressive light scattering filters (simulated cataracts) at a conventional visual acuity chart (solid circles) and a contrast sensitivity target (open circles). A glare source was placed next to the targets in all cases. Note that while contrast sensitivity gradually decreases as the simulated cataract progresses, visual acuity stays almost constant and then drops steeply when an 80% simulated cataract is reached. (LeClaire J, Nadler MP. Weiss S et al: A new glare tester for clinical testing. Arch Ophthalmol 100:153, 1982; and Miller D. Benedek GB: lntraocular Light Scattering, p 95. Springfield, IL, Charles C Thomas. 1973)