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  • Title: A comparison of laser photocoagulation with trans-scleral cryotherapy in the treatment of threshold retinopathy of prematurity.
    Author: Connolly BP, McNamara JA, Sharma S, Regillo CD, Tasman W.
    Journal: Ophthalmology; 1998 Sep; 105(9):1628-31. PubMed ID: 9754168.
    Abstract:
    OBJECTIVE: The goal of this study was to determine whether there was a significant difference between the visual outcomes of eyes with threshold retinopathy of prematurity (ROP) treated with trans-scleral cryotherapy compared to those treated with laser photocoagulation. DESIGN: Extended follow-up study of a prospective, randomized clinical trial. PARTICIPANTS: Fifty-two patients with bilateral threshold ROP participated. Follow-up data were available for 25 of these patients. INTERVENTION: Patients were randomized to receive cryotherapy in one eye and laser photocoagulation in the other eye. MAIN OUTCOME MEASURES: The best-corrected visual acuity of each eye was measured. Best-corrected visual acuities of 20/50 or better were classified as "good" clinical outcomes, whereas those 20/60 or worse were considered "poor" outcomes. A secondary outcome of this study was the spherical equivalent (SE) of each eye's most recent refraction. RESULT: At an average follow-up point of 5.8 years (range, 4.3-7.6 years), the odds that an eye treated with laser had a good clinical outcome were 6.91 times greater than for eyes treated with cryotherapy (95% confidence interval, 1.70-28.0; n = 21). Additionally, the laser-treated eyes were less myopic with a mean SE of-3.05 diopters compared to a mean SE of -5.08 diopters for the cryotherapy-treated eyes (P = 0.0072, n = 23). CONCLUSION: The authors' study suggests that laser photocoagulation for threshold ROP was more likely to result in a good clinical outcome with better final visual acuity and less myopia compared to cryotherapy treatment.
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