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Clinical Trial Summary

A refractive surprise can be defined as the failure to achieve the intended postoperative refractive target or the presentation of unexpected and, unwanted post-operative refractive error. It can cause anisometropia or dominance switch and is a source of patient dissatisfaction due to unmet expectations.The best way to manage refractive surprise is to prevent it. The 2017 NICE guidelines on the management of cataracts provide advice on prevention of refractive surprise through accurate biometry, A-constant optimisation, intraocular lens (IOL) formula selection and avoiding wrong lens implant errors.Benchmark standards for NHS cataract surgery dictate that 85% of eyes should be within 1 dioptre (D) and 55% within 0.5D of target spherical equivalent refraction following surgery.


Clinical Trial Description

Aim(s) of the Research: 1. detection of refractive surprises using autorefractometer, and corneal topography. 2. treatment of the resulting refractive error surprises. ;


Study Design


Related Conditions & MeSH terms


NCT number NCT06379477
Study type Interventional
Source Assiut University
Contact Abdelrahman M Saad, MSC
Phone +201067895256
Email arabasdm.23@gmail.com
Status Not yet recruiting
Phase N/A
Start date June 1, 2024
Completion date June 30, 2025

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