[Computerized and manual perimetry in patients with severe temporal visual field defects due to suprasellar tumors].
OBJECTIVE
To study, on Goldmann perimetry, a group of patients with complete temporal hemianopia on Humphrey perimetry (24-2 full threshold test) and to evaluate the percentage of eyes in which computerized perimetry failed to identify a temporal visual field remnants.


METHODS
Nineteen patients with visual field defect by chiasmal compression were prospectively studied with manual and automated perimetry. Twenty-five eyes with complete temporal hemianopia on Humphrey Field Analyzer, 24-2 threshold test were selected and studied with Goldmann perimeter, in order to evaluate the presence of a temporal visual field remnants. According to the result of Goldmann perimetry the eyes were divided into two groups: group 1, with complete temporal hemianopia; group 2, with residual temporal visual field remnants in the periphery. The mean number of mean deviation in the 2 groups was calculated and compared using Student's t test.


RESULTS
Automated perimetry failed to identify a temporal residual visual field in 17 of 25 eyes studied (68%). Mean values of the mean deviation in groups 1 and 2 were respectively -15.43 and -15.93. Statistical analysis did not indicate a significant difference between them.


CONCLUSIONS
Computerized automated Humphrey perimetry using 24-2 threshold test fails to identify temporal visual field remnants in a great percentage of patients with severe chiasmal compression. Analysis of the mean deviation is not helpful in identifying such cases. Patients evaluated on automated perimetry and presenting with a complete temporal hemianopia should be checked for temporal visual field remnants.
Pereira
Andrea
A
Divisão de Clínica Oftalmológica, Hospital das Clínicas, Faculdade de Medicina, Universidade de São Paulo.
Monteiro
Mário Luiz Ribeiro
ML
D000236:Adenoma / Q000150:complications*; D000293:Adolescent; D000328:Adult; D000368:Aged; D001932:Brain Neoplasms / Q000150:complications*; D003397:Craniopharyngioma / Q000150:complications*; D005260:Female; D006423:Hemianopsia / Q000175:diagnosis* / Q000209:etiology; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D008875:Middle Aged; D011446:Prospective Studies; D012720:Severity of Illness Index; D058609:Visual Field Tests / Q000295:instrumentation / Q000379:methods*; D014794:Visual Fields