Comparative study of two classifications of glaucomatous perimetric deficits

The purpose of this retrospectively study is to compare the results obtaine d using the unquestionable criteria, recommended by American Academy of Oph thalmology Versus the minimum criteria proposed by HODAPP. The first are fo unded on the degree of the depth of the deficits in dB, the second rake int o account the statistically significant loss. One hundred glaucomatous visual fields screened with the Humphrey perimeter , with program 24-2, are retained for their correct indices of reliability, a MD better than - 12 dB, and experience of the automated perimetry. This population was divided into two groups of 50. index MD greater than - 6 dB and index MD between - 6 and - 12 dB. The deficits were analyzed on the gra ph of individual deviation. Arcuate scotoma and nasal step were the majority of defects: 86 to 90 % at the stage of mild deficit, 98 % at the stage of moderate deficit. The defic its prevailed in the superior hemifield in 60 % of cases. Nasal projection accounted for less than half of the deficits when MD was > - 6 dB Its frequency fell to less than 10 % when MD worsened. Conversely t he frequency of arcuate scotoma increased. The isolated deficits decreased with the MD aggravation, but even when the deficit was mild, they accounted for already less than half of the cases. Most of the associated deficits w ere located in the hemifield opposite to the principal defect. Defects were larger and more frequently multiple with the AAO classification than with the HODAPP. The minimum criteria of the classification of glaucomatous visu al field defects proposed by HODAPP appear more specific than the unquestio nable criteria or the AAO, and also appear easier to use.