الفهرس 
Introduction and Aim of the WorkOnly 14 pages are availabe for public view
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Abstract
Summary
Corneal refractive surgery procedures have become increasingly popular over the past two decades. There are many
types of this surgery like ablative, additive, incisional, and
thermal. Patients with previous refractive surgery when mature,
many will eventually undergo cataract. Therefore, it is important to understand methods of accurate determination of intraocular lens power calculation after Keratorefractive
procedures to avoid refractive Surprises and patient dissatisfaction.
Many methods and formulae were adopted by many researchers to calculate IOL power accurately handling the
main problem of IOL power calculation in these patients which
is ELP. These methods and formulae can be classified according to
availability of patient’s data before and after refractive surgery
into methods need clinical history and others do not. Methods need clinical history like clinical history method,
Hammed-Wang-Koch method, adjusted EffRP, topographiccentral corneal power method, Jarade’s formula, Ronje method
and others.
Methods don’t need clinical history like contact lens overrefraction,
Maloney central topography, Modified Maloney method, Seitz/Speicher/Savini method, Savini-Barboni-Zanini,
Haigis–L method and BESSt method.
Formulae that need clinical history like Aramberri double
K formula, Feiz-Mannis formula, Latkany formula, Masket
formula, modified Masket and corneal bypass method.
Formulae don’t need clinical history like Intraoperative
refraction and modified double-K method
Many spread sheets are also now available online which
make the process of IOL power calculation after refractive
surgery easy by collecting many formulae and methods of IOL
power calculation in one software giving a chance to choose the
most appropriate one.
Because it has yet to be proven which proposed method
works best in all eyes, so the surgeon should use as many
methods as data is available and carefully evaluate the results