RESUMO
An automatic method for visual field screening using oculographic potentials have been evaluated on 12 eyes of 65 glaucoma patients. The oculographic perimeter records, plotting the central 22 degrees of the visual field, have been compared with Armaly's manual selective perimetry performed by the Goldman Perimeter. In spite of different testing standards of both methods, equivalent pathological field defects were demonstrated in 72% of the eyes following the first examination. Successive plottings with the automatic method improved the results considerably. The method has proved to be a reliable objective automatic test. Further development is suggested through which the procedure might be useful for glaucoma screening in the future.
Assuntos
Eletroculografia , Glaucoma/diagnóstico , Escotoma/diagnóstico , Testes de Campo Visual/métodos , Adolescente , Adulto , Idoso , Automação , Criança , Movimentos Oculares , Feminino , Humanos , Masculino , Programas de Rastreamento , Pessoa de Meia-IdadeAssuntos
Pletismografia/instrumentação , Transdutores/instrumentação , Vagina , Feminino , Humanos , MenstruaçãoRESUMO
The central visual field is tested using static perimetry on a tangent screen located 1 m from the patient. During the test electro-oculographic (EOG) potentials, associated with eye movements, are recorded. For this purpose two pairs of electrodes are placed in such a way that one pair records the vertical and the other the horizontal component of the EOG potential. The EOG signals that are produced when the tested eye moves toward the light target on the screen are digitized and fed into a computer programmed to relate each pair of signals to the specific lamp on the tangent screen. The results of the test appear on a computer-printed chart that shows the distribution of the lamps on the testing board together with the information whether the lamp was seen by the subject. This method of visual field testing is both objective and automatic.
