An observational study in Astigmatism and Cornea, sponsored by Wenzhou Medical University. Recruiting at 1 site in China. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-08-19.
Sponsored by Wenzhou Medical University · Observational
To analyze the difference between measured total corneal astigmatism and actual corneal astigmatism under different region modes and optimize the region setting.
Patients who received cataract surgery in The Eye Hospital of Wenzhou Medical University
Exclusion Criteria:
Patients who had received phacoemulsification surgery with or without implantation of toric IOL are with a certain amount of corneal astigmatism.
Other: 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.
Vectorial difference
The vectorial difference between measured corneal astigmatism (under multiple different region mode settings) and actual corneal astigmatism.
Time frame: ≥1 month after surgery
pupil size
pupil size of patients in a bright environment measured by itrace device and MONCV3 device
Time frame: ≥1 month after surgery
pupil size 2
pupil size of patients measured by Pentacam HR device
Time frame: ≥1 month after surgery
residual astigmatism
residual astigmatism tested by subjective refraction
Time frame: ≥1 month after surgery
total corneal astigmatism
Total corneal astigmatism measured by a scheimpflug tomographer under different region mode settings.
Time frame: ≥1 month after surgery
Anterior chamber depth
The distance between corneal apex and anterior surface of IOL measured by a scheimpflug tomographer
Time frame: ≥1 month after surgery
actual corneal astigmatism
actual corneal astigmatism is derived from residual astigmatism at corneal plane and cylindrical power of IOL at corneal plane through Holladay 2 formula.
Time frame: ≥1 month after surgery
Plan to share: No
No publications or documents are linked to this record.
Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.
Contact study teamGet an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.
Wenzhou Medical University