Factors Influencing Subjective Visual Quality in Human Eyes

Starting soon · Not applicable

Conditions studied: Corneal Wavefront Aberration, Refractive Errors

In brief

To assess subjective visual symptoms using the QoV questionnaire, measure pupil size using the Atongmu Pupillometer, measure wavefront aberrations using the OPD-Scan III Aberrometer, and measure/calculate the effective optical zone using the Pentacam system. The relationships between pupil size, higher-order aberrations (HOAs), effective optical zone after refractive surgery, and subjective visual symptoms will be explored.

Key facts

Study ID

NCT07518316

Run by

Tianjin Eye Hospital

People needed

300

Starts

2026-03-18

Expected to finish

2026-09-01

Last updated by the study team

2026-04-08

Who can join

Age: 18 and older, up to 45. Sex: any. Healthy volunteers: not accepted.

You may qualify if…

• Myopic or myopic astigmatism patients aged 18 to 45 years.
• Transparent ocular media, absence of ocular diseases such as corneal leucoma, cataract, etc.
• Round pupils with normal light reflex, absence of dyscoria, corectopia, significant persistent pupillary membrane, or absence of the pupil.
• Absence of severe psychological or psychiatric disorders, ability to cooperate with examinations and questionnaire completion.
• Subject agrees to participate in this clinical study and cooperate with examinations and related procedures.

You may not qualify if…

• Opacities of the ocular media, such as corneal leucoma, cataract, etc.
• Pupil deformation, displacement, significant persistent pupillary membrane, or absence of the pupil.
• Severe psychological or psychiatric disorders.
• Concurrent diagnosis of other ocular diseases (e.g., glaucoma, corneal opacity, uveitis, etc.).
• History of ocular surgery or trauma.
• Nystagmus or inability to cooperate.

Full record on ClinicalTrials.gov

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