purpose: to evaluate the effect of a multimedia software program on the ability of interpreting orbscan ii outprints in ophthalmology residents, affiliated to shahid beheshti university of medical sciences, and compared the results with the conventional teaching method. methods: this prosepective randomized crossover study enrolled 17 ophthalmology residents (11 second year and 6 third year). a...

To the Editor: In her recent editorial (Roberts C. The cornea is not a piece of plastic. J Refract Surg 2000;16:407-413), Dr. Roberts points out that biomechanical flattening enhances a myopic excimer laser ablation and works against a hyperopic ablation. Would the circular severing of corneal lamellae in hyperopic ablation not lead to a contraction of the central part of these lamellae with a ...