RecruitingNCT03299530

Accuracy of Corneal Astigmatism in Different Region Modes

Sponsor

Wenzhou Medical University

Enrollment

70 participants

Start Date

Oct 10, 2017

Study Type

OBSERVATIONAL

Conditions

Astigmatism Cornea

Summary

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

Eligibility

Min Age: 18 Years

Inclusion Criteria3

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 Criteria6

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;

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Interventions

OTHERpatients with corneal astigmatism

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.