You'd want bright (1000 or more lumens), business class projectors with at least XGA resolution or even SXGA (if your laptop or PC can do it) for better resolution of these lesions. Dell DLP PJ's are very economical for this purpose as brightness is more important than color fidelity or the dreaded rainbow effect (separation of colors on black and white images trailing your eyes when darting your eyes back and forth across the screen) that affect a minority of people (some worse than others). Dell has all kind of prices according to resolution and brightness. Use www.xpbargains.com to get Dell coupons to discount these PJ further.
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