Session Title: Cataract II
Session Date/Time: Sunday 05/02/2012 | 08:30-11:00
Paper Time: 08:48
Venue: Grand Ballroom
First Author: : R.Harvey UNITED KINGDOM
Co Author(s): : E. Salina
"Purpose:
Choosing the more accurate and reproducible method of correcting mild astigmatism (1 to 2.5 dioptres).
Setting:
Royal Alexandra Hospital Eye Clinic, Paisley, Scotland. Cataract pre-op clinic and optometrist review.
Methods:
Randomised allocation of patients to LRI versus OCCI. Informed consent. All patients have ""on axis"" surgery. Keratometry measured by IOLmaster. Marked whilst sitting upright. LRI patients have single use 550 micron limbal relaxing incisions. OCCI patients have 3.2 mm keratome incisions. RESULTS Average flattening of steep axis with LRI was 0.89 dioptres. Std deviation 0.58 dioptres.
Average flattening of steep axis with OCCI was 1.31 dioptres. Std deviation 0.45 dioptres.
Better unaided acuity with OCCI. Less postoperative discomfort with OCCI.
Conclusions:
OCCI has a significantly more predictable effect than LRI. If LRI was employed for all these patients many would have greater residual astigmatism.
Suggested management protocol:-
Corneal cylinder 0 to 0.99 On axis surgery.
Corneal cylinder 1.0 to 1.49 OCCI (using 3.2 mm keratome).
Corneal cylinder 1.5 to 2.49 extended OCCI (slightly widened OCCI).
Corneal cylinder 2.5 and upwards order a toric IOL.
Financial Disclosure:
No"
