RESUMO
An investigation of series of experiments on the visual system dynamics carried out by cosmonaut-researcher Iurii Mikhailovich Baturin [correction of Yuri M. Batourin] in the piloted complex "Mir" in August 1998. The implementation of the method of the visual system investigation with the use of the luminance sensitivity thresholds to the stimuli of distinguished spectral components in different points of the visual field helps to clarify some negative dynamics of the visual system functional conditions reflected in the luminance sensitivity thresholds.
Assuntos
Astronautas , Voo Espacial , Visão Ocular/fisiologia , Adulto , Astronautas/psicologia , Testes de Percepção de Cores/estatística & dados numéricos , Sensibilidades de Contraste , Humanos , Masculino , Psicofisiologia , Federação Russa , Acuidade Visual , Testes de Campo Visual/estatística & dados numéricosRESUMO
Clinical and immunological studies were carried out in 697 patients (913 eyes) for a more accurate diagnosis of herpetic involvement of the posterior segment of the eye by the focal allergic test (FAT) based on the delayed type hypersensitivity phenomenon. FAT consists in detection of the focal reaction in the eye, regularly developing after 2-3 intracutaneous injections of herpetic vaccine to types I and II herpes simplex virus in a dose of 0.2 ml every other day. The reaction is assessed by clinical and functional methods: visometry, campimetry, biomicroscopy, 9-point test, Amsler network, Hedinger's phenomenon, photocolor stress test, Rabkin's polychromatic tables, fluorescent angiography of the fundus oculi, electrophysiological methods, critical frequency of flash fusion, reflection microscopy of the corneal endothelium, and color campimetry realized on an IBM-compatible computer before and after vaccination of patients with suspected herpetic involvement of the eye. FAT was positive in 395 (56.6%) patients in 568 (62.2%) eyes. Examination of the threshold relative brightness sensitivity before and after FAT revealed positive results in 70% of patients. FAT is an accurate non-invasive method for the diagnosis of various manifestations of intraocular herpes. Relative safety of FAT recommends it for clinical practice to be used in the diagnosis of herpetic involvement of the posterior segment of the eye.
Assuntos
Infecções Oculares Virais/diagnóstico , Herpes Simples/diagnóstico , Herpesvirus Humano 1/imunologia , Herpesvirus Humano 2/imunologia , Doenças Retinianas/diagnóstico , Vacinas Virais , Adolescente , Adulto , Idoso , Diagnóstico Diferencial , Infecções Oculares Virais/virologia , Angiofluoresceinografia , Seguimentos , Fundo de Olho , Herpes Simples/virologia , Humanos , Hipersensibilidade Tardia/diagnóstico , Masculino , Pessoa de Meia-Idade , Testes do Emplastro , Reprodutibilidade dos Testes , Doenças Retinianas/virologia , Acuidade VisualAssuntos
Percepção de Cores , Óculos , Astenopia , Estudos de Casos e Controles , Feminino , Humanos , MasculinoRESUMO
Color campimetry was realized with the use of an IBM-compatible computer display with a program permitting the registration of brightness sensitivity thresholds and the time of sensorimotor reaction to visual stimuli offered on the display in each point of the visual field. Investigation of light and color sensitivity thresholds and of the time of sensorimotor reaction to stimuli of different spectral composition in normal subjects helped study the functional topography of the retina by the time of sensorimotor reaction and by the brightness sensitivity thresholds. The methods of equalization by the brightness of the stimulus and background by means of recording the time of sensorimotor reaction was tried in experiments with different background brightness and stimulus size and in ophthalmologic examinations of patients with color abnormalities, diseases of the retina and optic nerve, with glaucoma and albinism.
Assuntos
Doenças do Nervo Óptico/diagnóstico , Doenças Retinianas/diagnóstico , Testes de Campo Visual , Adulto , Albinismo/diagnóstico , Defeitos da Visão Cromática/diagnóstico , Diagnóstico Diferencial , Glaucoma/diagnóstico , Humanos , Pessoa de Meia-Idade , Campos VisuaisRESUMO
The authors present the first results of examining the vision system with the use of an automated programmed complex realized in the 'C' program language in the IBM and Dos operation system, that helped present in a chart the distribution of the ocular light sensitivity and time of the sensomotor reaction in every site of the visual field of 40-50 degrees. The results evidence that computer-aided methods may be effectively used to assess the light sensitivity of the eye, contrast sensitivity, space summation, rod and cone interactions, the topography of color photoreceptors, and the function of the posterior section of the eye in abnormalities of the retina and the optic nerve, as well as to monitor visual function rehabilitation after treatment.