Arch Ophthalmol. Aug;(8) Multicenter Trial of Cryotherapy for Retinopathy of Prematurity: ophthalmological outcomes at 10 years. Cryotherapy . The most effective proven treatments for ROP are laser therapy or cryotherapy. Laser therapy “burns away” the periphery of the retina, which has no normal. are discussed. Retinopathy of prematurity (ROP) is a leading cause of childhood blindness.’2 Cryotherapy was first used in the treatment of this condition in the.

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The method of treatment used in the study, peripheral retinal transscleral cryotherapy, was the form of retinal ablation most widely used at that time for treatment for ROP, and virtually all of the earlier clinical reports had used cryotherapy.

Study conclusions and recommendations. Many children who develop stage II improve with no treatment and eventually develop normal vision. Influence of the study on clinical practice in management of rop. Natural History Control Outcomes.

The screening recommendations were implemented, and most children in neonatal units had access to treatment within a short period of time following the initial roop of the study.

Facts About Retinopathy of Prematurity (ROP) | National Eye Institute

We anticipate that the study subjects will continue to be measured and data continue to be reported as the cohort reaches visual maturity and adulthood. It led to the publication of 50 or more manuscripts directly and has influenced many more publications and studies indirectly. Sign in to save your search Sign in to your personal account.

Create a personal account to register for email alerts with links to free full-text articles. The CRYO-ROP study was also very influential among ophthalmologists managing pediatric vision problems in adopting the Teller Acuity Card procedure, which is now used in many pediatric eye clinics to quantify visual function in preverbal children.

Other measurements of visual function also showed significant benefit in treated eyes, including contrast sensitivity and visual fields. A second examination by a different clinician was used as a measure to control for bias in staging. The primary outcome measure in the CRYO-ROP trial was the masked grading of photographs taken at the 3-month and month follow-up examinations.


When a baby is born full-term, the retinal blood vessel cryoo is mostly complete The retina usually finishes growing a few weeks to a month after birth. This involves placing a silicone band around the eye and tightening it. The differences in treatment outcome among the eyes with different stages of ROP, especially zone 1 vs zone 2, have also been an important finding in this study.

Grating visual acuity in eyes with retinal residua of retinopathy of prematurity: The most effective proven treatments for ROP are laser therapy or cryotherapy. The paired analysis provides a strong control for environmental covariables in these complex cases with many factors that might influence visual outcomes.

Purchase access Subscribe to cruo journal. While ROP treatment decreases the chances for vision loss, it does not always prevent it. The study identified the zone 1 eyes to have the worst prognosis both with and without treatment.

Results of U.S. randomized clinical trial of cryotherapy for ROP (CRYO-ROP).

About 1,—1, infants annually develop ROP that is severe enough to require medical treatment. It is difficult to overestimate the impact of this well-designed trial in taking the concept of ablative treatment from controversial ro; near universal acceptance within a short period of time. Currently in the U.

Dop, infants with more severe disease can develop impaired vision or even blindness. This causes a retinal detachment. Some of this caution was removed in the ropp of the 3-month interval publication. Many other secondary outcomes have been reported in the publications of study data. 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.

The existing information suggests that laser treatment is equivalent in effectiveness to cryotherapy. If, as the trial goals intended, a benefit was seen with cryotherapy, randomized patients were eligible to have this benefit only in one eye and were not eligible to be treated in the opposite ceyo eye. However, some patients presented with asymmetric involvement, requiring a different randomization scheme, randomizing to treatment or no treatment in the single randomized eye.

Ideally, one would select perfectly matched cases to randomize for an interventional trial.


Evaluating the Cryotherapy for Retinopathy of Prematurity Study (CRYO-ROP)

The most important early visual function outcome reported was visual measurement using forced preferential looking tests of grating resolution Teller Acuity Card procedure. Measurement of visual function of children with associated developmental, neurological, and ophthalmic complications of their premature birth is very difficult and complex.

Spanning more than 20 years so far, and involving hundreds of ophthalmologists, neonatologists, photographers, visual acuity testers, and other investigators in 23 clinical centers across the United States, this gargantuan effort has produced high-quality data about the benefits of cryi of retinopathy of prematurity ROP with peripheral retinal ablation as well as the natural history of ROP and the development and measurement of visual function in young children with developmental and visual impairment.

The blood vessels grow gradually toward the edges of the developing retina, supplying oxygen and nutrients. In the case of ROP, patients could present with symmetrical involvement of both eyes, allowing randomization of one eye for treatment and the other for control.

ROP occurs when abnormal ro; vessels grow and spread throughout the retina, the tissue that lines the back of the eye. In the study, non-physician staff in the NICU were trained to take the photos, which were made available to trained image readers, who evaluated whether the babies needed to be referred for potential treatment.

Nevertheless, there remain a substantial group of eyes, Sign in to make a comment Sign in to your personal account. Cfyo, trials must be judged first on the ability to achieve the prospective goals of the investigation, generally a question of benefit and safety of the intervention being tested. The natural history cohort has provided unique, well-documented information about the course of eyes with advanced acute ROP without treatment.

Stage II — Moderately abnormal blood vessel growth. Sign in to download free article PDFs Sign in to access your subscriptions Sign in to your personal account.