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. 1998 Nov;82(11):1254–1259. doi: 10.1136/bjo.82.11.1254

Three year visual outcome for treated stage 3 retinopathy of prematurity: cryotherapy versus laser

I Pearce 1, F Pennie 1, L Gannon 1, A Weindling 1, D Clark 1
PMCID: PMC1722425  PMID: 9924328

Abstract

BACKGROUND/AIMS—In the management of retinopathy of prematurity (ROP), several studies have demonstrated laser photocoagulation to be as effective as cryotherapy in reducing the incidence of unfavourable structural outcome. However, few data are available on the functional outcome. The 3 year visual acuity outcome of infants treated with laser or cryotherapy in a neonatal unit is presented.
METHODS—The case notes of 34 infants (64 eyes) treated with cryotherapy, between 1989 and 1992, and 32 infants (59 eyes) treated with laser, between 1992 and 1995, were reviewed.
RESULTS—In the cryotherapy group 69% of eyes had a favourable structural outcome. Of these structurally successful eyes 62.5%, 35.0%, and 33.3% of eyes had visual acuities within normal limits at the 12 month, 24 month, and 36 month corrected age milestones respectively. In the laser group 93% of eyes had a favourable structural outcome. Of these structurally successful eyes 96.4%, 66.7%, and 59.5% of eyes had visual acuities within normal limits at the 12 month, 24 month, and 36 month corrected age milestones respectively.
CONCLUSION—In the management of ROP, when laser photocoagulation induces a structurally successful result, the potential for normal visual acuity development at 3 years is high. Whether the poorer functional outcome of the eyes treated with cryotherapy is an artefact of the historical nature of the study or as a result of an adverse effect of the destructive transcleral application is unknown.

 Keywords: retinopathy of prematurity; laser; cryotherapy; visual outcome

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Figure 1  .

Figure 1  

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Percentage of recorded vision (monocular and binocular combined) within normal limits.

Selected References

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