The purpose of the proposed study is to examine the long-term structural and functional effects of cryotherapy as a treatment for severe retinopathy of prematurity (ROP). In the initial phase of the study, eyes with 5 contiguous or 8 total clock hours of stage 3 plus, in 291 infants with birth weights less than 1251 g, were randomized to receive cryotherapy or not cryotherapy. Follow-up to age 12 months indicated that cryotherapy reduced the incidence of unfavorable structural outcome by ~5.8 percent and the incidence of unfavorable visual acuity outcome by 37.8 percent. Based on the preliminary data, follow- up to age ~2 months during Phase II of the study indicated that cryotherapy reduced the incidence of unfavorable structural outcome by 39.1 percent. As for vision, cryotherapy reduced the incidence of unfavorable resolution acuity outcome by 21.4 percent, and by 19.7 percent when based on measurement of recognition acuity.

Agency
National Institute of Health (NIH)
Institute
National Eye Institute (NEI)
Type
Cooperative Clinical Research--Cooperative Agreements (U10)
Project #
5U10EY006355-13
Application #
2430338
Study Section
Vision Research and Training Committee (VSN)
Project Start
1985-09-30
Project End
1998-05-31
Budget Start
1997-06-01
Budget End
1998-05-31
Support Year
13
Fiscal Year
1997
Total Cost
Indirect Cost
Name
University of Utah
Department
Ophthalmology
Type
Schools of Medicine
DUNS #
City
Salt Lake City
State
UT
Country
United States
Zip Code
84112