Accuracy of Corneal Astigmatism in Different Region Modes

Wenzhou Medical University70 enrolled

Overview

To analyze the difference between measured total corneal astigmatism and actual corneal astigmatism under different region modes and optimize the region setting.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Astigmatism Cornea

Interventions

patients with corneal astigmatismOTHER

The total corneal astigmatism, anterior chamber depth, will be measured by a Scheimpflug tomographer. Pupil size will be measured by itrace device and MONCV3 device. Residual astigmatism will be tested by subjective refraction.

Eligibility

Sex: ALLMin age: 18 Years

Medical Language ↔ Plain English

Inclusion Criteria: * Age ≥ 18 years * Patients who had received phacoemulsification surgery with or without implantation of toric IOL are with a certain amount of corneal astigmatism. * Best corrected visual acuity ≥ 0.66 (20/30 Snellen) Exclusion Criteria: * Corneal diseases or severe irregular astigmatism (e.g., pterygium, keratoconus), existence of corneal opacification; * Ocular disease which may affect visual acuity (e.g., glaucoma, uveitis, retinal disease, pathologic myopia); * History of ocular surgery or ocular trauma before this cataract surgery; * Decentration of IOL \> 0.3mm or tilt \> 5° * Implantation of multifocal IOL * history of wearing of rigid contact lens within the past 4 weeks or soft contact lens within 1 week;

Locations (1)

Eye Hispital of Wenzhou Medical University

Wenzhou, Zhejiang, China

RECRUITING

Outcomes

Primary Outcomes

Vectorial difference

The vectorial difference between measured corneal astigmatism (under multiple different region mode settings) and actual corneal astigmatism.