Accuracy of Corneal Astigmatism in Different Region Modes

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Total Enrollment

70 participants

Study Classification

OBSERVATIONAL

Study Start Date

2017-10-10

Study Completion Date

2026-10-28

Brief Summary

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

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Detailed Description

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Conditions

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Astigmatism Cornea

Study Design

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Observational Model Type

CASE_ONLY

Study Time Perspective

CROSS_SECTIONAL

Study Groups

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patients with corneal astigmatism

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

patients with corneal astigmatism

Intervention Type OTHER

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.

Interventions

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patients 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.

Intervention Type OTHER

Eligibility Criteria

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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;

Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No