Overview

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

Eligibility

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;