NCT06148857

Total Corneal Astigmatism Prevalence in Cataract Patients

Prevalence Data for Total Corneal Astigmatism in Cataract Surgery Candidates

• Status: Unknown
• Phase: —
• Study type: Observational
• Enrollment: 11,000 (estimated)
• Sponsor: Peking University Third Hospital · Academic / Other
• Sex: All
• Age: —
• Healthy volunteers: Not accepted

Summary

The purpose of this study is to report the prevalence data for total corneal astigmatism (TCA) in cataract surgery candidates.

Detailed description

The purpose of this retrospective study is to report the prevalence data for total corneal astigmatism (TCA) in cataract surgery candidates. Preoperative biometric data of all the patients who underwent cataract surgery in the Department of Ophthalmology, Peking University Third Hospital, from January 2019 to May 2023, were collected and analyzed. Data sets with incomplete biometric data were excluded.

Conditions

• Cataract

Interventions

Type	Name	Description
DIAGNOSTIC_TEST	IOLMaster 700	The IOLMaster 700, one of the most commonly used optical biometers for IOL power calculation, measures the anterior corneal surface radius using a telecentric keratometry. Additionally, it employs swept-source optical coherence tomography (SS-OCT) technology to simultaneously measures the posterior cornea surface radius and central corneal thickness (CCT). The AK formula, described by Abulafia et al., is a regression formula that calculates an estimated TCA using K astigmatism. The Barrett toric calculator uses an unpublished mathematical prediction method of TCA based on anterior corneal measurements.

Timeline

• Start date: 2023-11-01
• Primary completion: 2023-11-01
• Completion: 2023-12-01
• First posted: 2023-11-28
• Last updated: 2023-11-28

Locations

1 site across 1 country: China