Clinical Cases in Contact Lenses by Ronald K. Watanabe OD FAAO

By Ronald K. Watanabe OD FAAO

This medical instruction manual provides universal touch lens issues of step by step remedy ideas. 40 case experiences conceal more than a few difficulties from easy becoming dilemmas to opposed results of touch lens put on. each one case starts off with a presentation of signs and indicators, together with a case heritage and goal attempt findings and ends with the author's prognosis and dialogue.

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This is even more evident considering that the pupil size in an ocular photograph very likely is smaller than it would be under dark lighting conditions. Since this patient’s complaints occur under dimmer illumination conditions, it is important to measure the pupil size in a dark room. Also, because he is a young Caucasian male with blue irises, he is more likely to have larger pupils and therefore notice visual flare from the optic zone junction. The patient will be able to ignore some amount of flare as he adapts.

This type of problem can be diagnosed and managed easily by first performing a comprehensive case history. Clinical Pearls • Vigorous daily cleaning with an abrasive cleaner can cause RGP parameter changes. • A careful case history and good patient education can prevent recurrence of this problem. References 1. Bennett ES, Henry VA. RGP lens power change with abrasive cleaner use. Int Contact Lens Clin. 1990;17(3):152–153. 2. Carrell BA, Bennett ES, Henry VA, Grohe RM. The effect of rigid gas-permeable lens cleaners on lens parameter stability.

Also, the left lens had a greater power change because the right lens had been replaced recently. The patient was advised of the parameter changes. A new pair of lenses was reordered with the original parameters. Boston Advance Comfort Formula was prescribed, and the patient was educated on proper daily cleaning technique. 1–5 In the office, modification tools can be used to change the power, polish the lens surfaces, change the edge shape, and change peripheral curves. At home, patients can also alter lens parameters if an abrasive cleaner is used with heavy finger pressure.

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