New Formula for Lasik Surgery on Myopic & Hypermetropic Eyes
Abstract
In this paper a new formula is derived for Lasik surgery on Myopic and Hypermetropic eyes. This article has given another formula to calculate the depth of cornea to be ablated, derived mathematically.
Formula; depth of cornea of myopic eye to be ablated in micron= [r1ΓD1Γ· D2]- [π2 2 β (π Γ· 2) 2 ]Γ1000
Formula; depth of cornea in hypermetropic eye to be ablated on either sides in Β΅= π 2 β π2 2 β [π2 β [π1 β π1 2 β π 2 2 ] ] 2 Γ 1000
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Introduction
LASIK is acronym of laser assisted in situ keratomileusis. LASIK has become the standard approach for (corneal) refractive surgery by most ophthalmologists. Time has taught the refractive surgeon the omnious importance of doing a good surgical plan. Cornea is molded by laser. Itβs diameter of refractive surface either increased or decreased in order to increase or decrease the power of entire cornea. Charles Munnerlynβs [1] [2] [3] formula is used by lasik machine.
This article has given another formula to calculate the depth of cornea to be ablated, derived mathematically.
Conclusion
New formulae for myopic and hypermetropic eyes for LASIK surgery are mathematically derived and shall definitely give better result if incorporated to lasik machine.
Correction of 1D myopia with 4mm diameter by ablating 5.475Β΅.
Correction of hypermetropia with 4mm diameter by ablating 19.575 Β΅ on one side.
Maximum possible correction of hypermetropia is 9.59D and of myopia is 34.285D with diameter of ablation at 3mm and flap thickness 75Β΅.to avoid night glare the adjacent cornea must be gradually decreased in power of correction till diameter of 6mm of central cornea.