Radial Keratotomy Fig 518e

Principle: Correction of myopia by flattening the central dome of the cornea with four to sixteen radial incisions extending through as much as 90% of the thickness of the cornea. This increases the steepness of the corneal periphery and lowers the center of the cornea, reducing its refractive power. This method does not influence the optical center of the cornea (Fig. 5.22).

Indications and prognosis: The method is suitable for moderate myopia (less than 6 diopters). The effect achieved is influenced by the initial refraction, intraocular pressure, corneal thickness, and the patient's age and sex. A

Fig. 5.22 Myopia is corrected with radial incisions in the cornea (twelve in this case). This flattens the dome of the central cornea and increases the steepness of the corneal periphery.

Diopter Visual Acuity

disadvantage is refractive fluctuations of up to 1.5 diopters during the course of the day. In one-fifth of all cases refraction becomes unstable within a year.

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