The old way of correcting Myopia!
Radial Keratotomy
Radial Keratotomy is a refractive surgery procedure to correct myopia
Developed in 1974 by Svyatoslav Fydorov
It is now obsolete and has been replaced by laser based refractive surgery procedures such as Photorefractive Keratectomy (PRK) and LASIK
Incisions:
● Series of 4-8 deep radial corneal stromal incisions in a spoke like pattern
● Starting from central optical zone (4mm) till the limbus in the mid-peripheral and peripheral cornea
● Approximately 90% of depth of the cornea
● Mid-periphery of cornea bows anteriorly, weakens paracentral and peripheral cornea and flattens the central cornea thus correcting myopia
Basic steps:
1) Application of anaesthesia
2) Marking the visual axis
3) Marking the optical zone
4) Measuring the corneal thickness
5) Setting the depth of the blade
6) Marking the corneal incisions
Complications:
● Corneal perforation (micro or macro)
● Incisions across visual axis - glare, astigmatism, scarring
● Decentration of incisions
● Overcorrection
● Undercorrection
● Astigmatism
● Infectious keratitis
● Traumatic rupture of keratotomy scars
Image from Rajan Eye Care Hospital
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