Surgically Induced Astigmatism of Temporal Versus Nasal Clear Corneal Phacoemulsification

To compare the short-term astigmatic outcomes of phacoemulsification cataract surgery and intraocular lens implantation using temporal versus nasal clear corneal incisions.

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Key information

Conditions

Surrgical Induced Astigmatism Astigmatism Eye Diseases Refractive Errors

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Ophthalmic research center

Tehran, Tehran Province, 16666, Iran

About this study

In a clinical trial, consecutive eyes with senile cataract underwent phacoemulsification with implantation of a 6.0 mm foldable hydrophobic acrylic intraocular lens through a 3.2 mm horizontal clear cornea incision at 180 degrees (temporal incision in right eyes, nasal incision in left eyes). Keratometric astigmatism was measured preoperatively and one and four weeks and 6 months after surgery. Surgically induced astigmatism (SIA) was calculated by the vector analysis method using the Holladay-Cravy-Koch formula. Patients with history of diabetes mellitus, connective tissue disorders, steroid use, previous ocular surgery, with the rule astigmatism >1D, pseudoexfoliation and any corneal pathology were excluded.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

All the patients with senile cataract

Exclusion criteria

Previously operated eyes
Presence of corneal pathology
Pseudo exfoliation
With-the-rule (WTR) astigmatism >1 D
Presence of diabetes mellitus
History of connective tissue disease
Consumption of systemic steroids

Treatment and study plan

phacoemulsification and intraocular lens implantation

Procedure

clear cornea phacoemulsification and intraocular lens implantation using temporal or nasal incisions respectively

Primary outcomes

Total and Surgical Induced Astigmatism

Time frame: At 1 and 4 weeks and 6 month after surgery

Sponsors and collaborators

Lead sponsor

Shahid Beheshti University of Medical Sciences

Other

Registry information

Important dates

Study start: 2005
Study completion: 2006
First posted: Aug 28, 2007
Registry last updated: Sep 5, 2007

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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Completed