Comparison of the Amblyopia Treatment Study HOTV and the Electronic-Early Treatment of Diabetic Retinopathy Study visual acuity protocols in amblyopic children aged 5 to 11 years

Eileen E. Birch, Samara F. Strauber, Roy W. Beck, Jonathan M. Holmes

Research output: Contribution to journalArticlepeer-review

12 Scopus citations

Abstract

As part of the long-term follow-up of amblyopic children who were enrolled in the Amblyopia Treatment Study, we tested visual acuity in both eyes of 142 patients by using 2 established visual acuity protocols, the Amblyopia Treatment Study HOTV (ATS HOTV) visual acuity protocol and the Electronic-Early Treatment of Diabetic Retinopathy Study (E-ETDRS) protocol, at one of the annual visits. Mean age at the time of testing was 9.0 years (range, 5.6-11.9 years). The ATS-HOTV protocol resulted in a slight mean overestimate of visual acuity relative to the E-ETDRS protocol (0.68 lines for amblyopic eyes; 0.25 lines for fellow eyes). The overestimation occurred primarily when the E-ETDRS visual acuity was poorer than 0.3 logMAR. ATS-HOTV acuity also underestimated interocular visual acuity differences by 0.42 lines. When one uses the ATS-HOTV protocol, it may be wise to exercise caution when interpreting "near-normal" visual acuity or interocular differences as "within normal" because the ATS-HOTV method may have a slight bias toward better performance of amblyopic eyes than E-ETDRS.{A figure is presented}.

Original languageEnglish (US)
Pages (from-to)75-78
Number of pages4
JournalJournal of AAPOS
Volume13
Issue number1
DOIs
StatePublished - Feb 2009

ASJC Scopus subject areas

  • Pediatrics, Perinatology, and Child Health
  • Ophthalmology

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