By Ronald K. Watanabe OD FAAO
This medical guide offers universal touch lens issues of step by step remedy strategies. 40 case reports conceal a number of difficulties from uncomplicated becoming dilemmas to hostile results of touch lens put on. each one case starts off with a presentation of indicators and indicators, together with a case historical past and goal try findings and ends with the author's prognosis and dialogue.
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Additional info for Clinical Cases in Contact Lenses
However, the bitoric lens can be challenging to fit, especially when not used frequently. 25 D in most cases, which is optimal because the lens attains a stable central to superior-central position more easily. 1–4 In this case, although the base curve radii were ordered according to these guidelines, the lens ended up undercorrecting the corneal toricity. The moderate toricity in the fluorescein pattern is evidence of this: the horizontal flat meridian has good alignment, but the vertical steep meridian has a flat-fitting relationship.
Use optical crosses to determine the final prescription for bitoric RGP lenses. References 1. Sarver MD, Mandell RB. Toric lenses. In: Mandell RB (ed). Contact Lens Practice, 4th ed. Springfield, IL: Charles C Thomas, 1988:292–305. 2. Sarver MD, Kame RT, Williams CE. A bitoric gas-permeable hard contact lens with spherical power effect. J Am Optom Assoc. 1985;56(3):184–189. 3. Edrington TB. Rigid gas-permeable lenses for astigmatism. In: Hom MM (ed). Manual of Contact Lens Prescribing and Fitting with CD-ROM, 2nd ed.
CASE 2-4 Blurry Vision with Rigid Gas-Permeable Lenses Figure 2-4 History HG is a 41-year-old Caucasian male accountant. He presents for his annual eye exam with complaints of blurry vision with his contact lenses (CL), especially at near. He reports that this has been a gradual change he has noticed over the past 2–3 months. 50 D drug store readers to wear over his contact lenses, which seems to clear up his vision. He has no complaints about lens comfort and can wear his lenses 14 hours a day.
Clinical Cases in Contact Lenses by Ronald K. Watanabe OD FAAO