The investigators' purpose is to study the induced refractive change caused by different 2.8-mm corneal incision locations in phacoemulsification, because the investigators hypothesize that the effect may be different for nasal, temporal, and superior location, although they are considered astigmatism neutral. Patients will be randomized to nasal or temporal incision, or assigned to superior incision, depending on preexisting astigmatism. Visual acuity, refraction, keratometry, Pentacam analysis, intraocular pressure, biomicroscopy, and funduscopy, will be carried out before and after phacoemulsification. Outcome measures will be induced corneal refractive change (Fourier power vector analysis), ISV change, and visual acuity, at 6 months.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
TRIPLE
Enrollment
108
Phacoemulsification through a nasal 2.8-mm incision
Phacoemulsification through a 2.8-mm temporal incision
Phacoemulsification through a superior 2.8-mm corneal incision
Dept Ophthalmology, Hospital Universitario Ramón y Cajal
Madrid, Madrid, Spain
Induced corneal refractive change
Time frame: 6 months
ISV change
Time frame: 6 months
Visual acuity
Time frame: 6 months
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