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

By Ronald K. Watanabe OD FAAO

This scientific guide provides universal touch lens issues of step by step remedy ideas. 40 case reviews conceal a variety of difficulties from simple becoming dilemmas to hostile results of touch lens put on. each one case starts with a presentation of indicators and symptoms, together with a case background and target try out findings and ends with the author's analysis and dialogue.

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London: Chapman and Hall, 1994:565. 5. Theodoroff CD, Lowther GE. Quantitative effect of optic zone diameter changes on rigid gas-permeable lens movement and centration. Int Contact Lens Clin. 1990;17(2):92–95. CASE 2-2 Visual Flare, Part 2 Figure 2-2 History A 49-year-old Caucasian male presents for his first progress evaluation on his new aspheric multifocal rigid gas-permeable (RGP) contact lenses (CL). He feels that he is adjusting to his new lenses well but is bothered by his night vision.

A small pupil limits peripheral light rays, resulting in less defocused light reaching the retina. 1–5 This patient’s complaints occurred primarily at night. We can presume that the patient’s pupils are larger at night, which would explain why the patient noticed this symptom only then. With single-vision RGP lenses, we can adjust zone diameters to try to decrease the flare. 54 Clinical Cases in Contact Lenses With multifocals, we lack this luxury. We must therefore minimize flare with good lens positioning and educate the patient on the reasons for these symptoms.

Contact Lens Forum. 1986;11(3):48–49. CASE 2-3 Sudden Onset Blur in One Eye Figure 2-3 History A 19-year-old Caucasian male presents at his first rigid gas-permeable (RGP) contact lens (CL) follow-up visit with complaints of suddenonset blurry vision in his right eye only that began 2 days earlier. He was dispensed a new pair of RGP lenses 1 week prior. At that visit, visual acuity was good in each eye. He also notes some discomfort and is discouraged about the lenses, although he knows that he has to adapt to the lenses over the course of 2 or 3 weeks.

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