Astigmatism, Cataract
Conditions
Keywords
astigmatism, pseudophakia
Brief summary
This study is to evaluate the necessity of considering posterior corneal toricity on refractive outcome of patients with cataracts and corneal astigmatism after implantation of intraocular lenses. This is determined by comparing total corneal and refractive astigmatism,and by comparing the expected refractive result with actual refractive astigmatism postoperatively,using total corneal and anterior corneal astigmatism to calculate respectively.
Interventions
PROCEDUREphacoemulsification
After topical anesthesia with Alcaine, 3.0-mm clear corneal incisions were made. Torsional phacoemulsification was performed using the Infiniti Vision System with the OZil handpiece, a 45-degree Kelman miniflared tip, and DuoVisc viscoelastic (all from Alcon).
DEVICEPentacam (Oculus,Germany)examination
Total corneal astigmatism is obtained by Pentacam at every visit.
Sponsors
China Medical University, China
Study design
Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to 80 Years
Healthy volunteers
No
Inclusion criteria
* cataract candidates * preoperative corneal regular astigmatism \>0.75D * Willing and able to complete all required postoperative visits * Able to comprehend and sign a statement of informed consent
Exclusion criteria
* significant intraocular lenses tilt or decentration * corneal scarring * Irregular corneal astigmatism * other ocular diseases * surgical complication
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| Pentacam-derived corneal astigmatism | 3month postoperatively |
| refraction | 3month postoperatively |
Countries
China
Contacts
Primary ContactQi Sun, MD
Outcome results
None listed