الفهرس 
IntroductionOnly 14 pages are availabe for public view
 |  | from | 101 |  |  |
| | | from | 101 | | |
Abstract
The predictive performance of the formulae, however, diminishes in eyes with high hyperopia, where obtaining accurate postoperative refractive results can be particularly challenging. Reasons for poorer performance in hyperopia are multifactorial, but a potential problem is that the Holladay and SRK/T formulae assume a linear relationship between AL and ACD, which may not exist in small eyes.
It has been suggested that the Hoffer Q, which assumes a tangential relationship between AL and ACD may be more accurate in high hyperopia. Guidelines from bodies such as the Royal College of Ophthalmologists (RCOphth), which have been superseded by the National Institute for Health and Care Excellence (NICE) guidelines, suggest that the Hoffer Q is more accurate in patients with AL< 22 mm.
Our study was aiming to examine refractive outcomes after cataract surgery in hyperopic patients and to explore differences in predictive error between biometric formulae (Hoffer Q and SRK/T) using IOL master (Carl Zeiss Meditec, Inc, Dublin, CA, USA) and Auto refractometer Topcon (RM-8000B).
The study was an observational clinical study (analytic cross sectional). 180 eyes from 180 patients with axial length <22 mm were identified from patients undergoing cataract surgery by phacoemulsification at Ophthalmology Department, Faculty of Medicine, Suez Canal University. selected cases were divided into two groups 90 eyes in each. One group used Hoffer Q formula (n= 90) and the other group used SRK/T formula (n= 90).