cataract
Conditions
Interventions
control group:0.5mm of transparent corneal incision to corneal limbus
experiment group:1.5mm of transparent corneal incision to corneal limbus
Sponsors
Department of Ophthalmology, the Second Affiliated Hospital of Xi 'an Jiaotong University
Eligibility
Sex/Gender
All
Age
50 Years to 85 Years
Inclusion criteria
Inclusion criteria: 1) diagnosed as age-related cataract; 2) agree to this study and accept the follow-up regularly; 3) level II – III of crystal nucleus hardness; 4) older than 50 years old.
Exclusion criteria
Exclusion criteria: 1) with severe systemic disease; 2) the history of eye surgery or eye disease, such as dry eye, high myopia, hyperopia, corneal astigmatism is greater than 1 D, diabetic retinophy, glaucoma, corneal scarring, lens dislocation, age-related macular degeneration, etc; 3)suffer from the cornea old ring or the corneal limbus position is not clear; 4) the cornea is too big or too small; 5) the difference of K1 and K2 > 1.5 D(Pentacam Three-dimensional anterior segment analyzer is used to examine the corneal curvature).
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| surgically induced astigmatism; | — |
Secondary
| Measure | Time frame |
|---|---|
| postoperative visual acuity;discrepancy;cornea thickness;The actual distance of incision to corneal limbus;endothelial cell counting;McMonniesg dry eye symptoms questionnaire;The thickness of macular center;VFQ-25;Quality of life questionnaire;postoperative complications; | — |
Countries
China
Contacts
Public ContactWang Jianming
Department of Ophthalmology, the Second Affiliated Hospital of Xi 'an Jiaotong University
Outcome results
None listed