Biomedical subjects
Publications and source records attributed to L W Carr.
Current ophthalmic laser treatment can be described on the basis of its effect on tissue. Laser variables such as wavelength, spot size, power, and mode of delivery are all controllable, but are dependent on the transparency, pigmentation, and water content of the tissue involved. This discussion introduces the clinician to these variables, while describing specific laser-tissue interactions.
The majority of complications associated with laser procedures can be minimized or avoided through proper technique. The astute clinician is aware of all potential complications and is prepared to manage any undesired effects promptly and correctly. This review discusses how to minimize the risk of significant complications and describes the appropriate treatment protocols for complications associated with specific anterior segment laser procedures.
A 70-year-old male experienced unilateral monocular triplopia of lenticular origin. The images formed a nearly equilateral triangle and were equally clear. It was noted that the images were formed by sections of the crystalline lens whose borders were parallel to the orientation of the anterior Y-sutures.
The effect of the diameter of the fusion lock on the forced vergence fixation disparity (FD) curve was investigated because of ambiguity in the results of previous investigations. Data gathered from 20 asymptomatic subjects with normal binocularity showed that the fusion lock diameter had no noticeable effect on the shape of the curve. Further investigations using symptomatic subjects showing large FDs or steep forced vergence FD curves showed that fusion lock diameter did have an effect on the curves of these subjects. The results are interpreted for their clinical implications through a control systems model of the accommodation-vergence interaction.