Accuracy of Corneal Astigmatism in Different Region Modes

Wenzhou Medical University

Status: Enrolling

Conditions: Astigmatism; Cornea

Treatments: Other: patients with corneal astigmatism

Study type: Observational

Funder types: Other

Identifiers

NCT03299530

2017ASTIGMATISM REGIONS

Details and patient eligibility

About

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

Enrollment: 70 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

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;

Trial design

70 participants in 1 patient group

patients with corneal astigmatism

Description:

Patients who had received phacoemulsification surgery with or without implantation of toric IOL are with a certain amount of corneal astigmatism.

Treatment:

Other: patients with corneal astigmatism