ABSTRACT
Optic coherent tomography was used to monitor three cases of successful laser retinal coagulation in involutional macular degeneration followed by transsudative retinal detachment of the pigment epithelium and neuroepithelium to give rise to a subretinal neovascular membrane. The technique was shown to be of high informative value in providing an accurate localization of abnormal macular changes and in monitoring their state. The application of optic coherent tomography could reduce the number of control angiographies and, in a number of cases, to obviate a necessity of performing angiographic studies.
Subject(s)
Laser Coagulation , Macular Degeneration/diagnosis , Macular Degeneration/surgery , Tomography, Optical Coherence , Aged , Female , Fluorescein Angiography , Follow-Up Studies , Humans , Middle Aged , Time Factors , Treatment OutcomeABSTRACT
Optic coherent tomography (OCT) was used to examine 14 persons (15 eyes) before and the following day after laser cataract extraction with intraocular lens implantation. There were slight, but statistically significant differences in the quantitative indicators of OCT in the eyes of immature cataract and pseudophakia (a reduction in the minimum retinal thickness in the foveolar area and that in the design volume of the macular area by the order of 1.4% of the baseline value). The above differences are likely to be largely due to the optic features of the pseudophakic eye; however, this suggestion needs further experimental and clinical studies.
Subject(s)
Cataract Extraction , Cataract/diagnosis , Pseudophakia/diagnosis , Tomography, Optical Coherence , Aged , Aged, 80 and over , Cataract Extraction/methods , Female , Follow-Up Studies , Humans , Laser Therapy , Lens Implantation, Intraocular , Male , Middle Aged , Time FactorsABSTRACT
The study of the informative value of new radiation methods for diagnosing macular pathology has demonstrated that introduction of techniques, such as angiography using indocyanine green and optical coherent tomography, makes it possible to increase the informative value of diagnosis, to define treatment policy, and to more clearly assess the time course of abnormal changes in different forms of abnormal macular changes. The precise definition of the site and sizes of the subretinal neovascular membrane facilitates the performance of laser therapy (focal laser coagulation and transpupillary thermotherapy) and enhances its efficiency.
Subject(s)
Fluorescein Angiography/methods , Macular Degeneration/diagnosis , Retinal Neovascularization/diagnosis , Tomography, Optical Coherence/methods , Diagnosis, Differential , Follow-Up Studies , Fundus Oculi , Humans , Reproducibility of Results , Time FactorsABSTRACT
Fifty patients with insulin-dependent diabetes mellitus (DM) and with the disease record ranging from 6 months to 5 years and 30 virtually healthy persons were examined. The follow-up varied from 1.5 to 2 years. The obtained results were made use of to formulate the below diagnostic criterion: a simultaneous increase of the levels of the coagulation activity of the lachrymal fluid (LF) and of the glucose concentration in LF with at least one such phenomenon being registered in one eye and a total asymmetry of more than 0.75 are indicative of diabetic retinopathy or of the possibility it would develop. The mentioned diagnostic criterion can be applied for detecting the risk groups among the DM patients.
Subject(s)
Diabetes Mellitus, Type 1/complications , Diabetic Retinopathy/diagnosis , Glucose/analysis , Tears , Adult , Blood Glucose/analysis , Diabetic Retinopathy/blood , Electroretinography , Fluorescein Angiography , Follow-Up Studies , Humans , Middle Aged , Ophthalmoscopy , Prognosis , Risk Factors , Tears/chemistry , Tears/physiology , Time FactorsABSTRACT
The authors review a complex of the hardware and software for the design of an automated multi-functional pattern-stimulator based on a microprocessor KR1810BM86A with a possibility of exercising remote control via the RS-232C channel and autonomous work controlled by a built-in keyboard and a matrix display. The stimulator is capable of forming multi-pattern stimulation images with angular resolution of one element of the eye retina as well as of performing different stimulation types within a wide range of intensities and colours. The software of the stimulator represents a multi-task operative system in the real time mode.
Subject(s)
Microcomputers , Computers , SoftwareABSTRACT
Critical frequency of light flickering rhythm reproduction in visual evoked potentials (CFLF) was studied in 25 patients (35 eyes) with partial optic nerve atrophy, 4 patients (7 eyes) with moderate changes in the optic route suprachiasmal sections, and 23 normal subjects; automated static perimetry and visometry were carried out as well. CFLF was found reduced in the majority of patients with optic nerve atrophy, whereas in suprachiasmal involvement this parameter remained within the normal range. CFLF values were in good correlation with vision acuity and light sensitivity of visual field sites within the angle of 15 degrees from the center (the correlation was higher for foveal light sensitivity when it was expressed in relative units, and for light sensitivity of paracentral visual field sites when expressed in logarithmic units). The authors come to a conclusion that CFLF functional and anatomic substrate is the foveal area cortical projection sites and, to a lesser degree, cortical projection sites of visual field sites within 15 degrees from the center; in optic nerve atrophy CFLF values depend on the status of the optic nerve sections (the axial bundle) corresponding to a certain visual field site.
Subject(s)
Evoked Potentials, Visual , Adolescent , Adult , Child , Female , Humans , Male , Middle Aged , Optic Atrophy/physiopathology , Visual Acuity , Visual Field TestsABSTRACT
Vision acuity and differential photosensitivity were examined, and electroretinography and electrooculography data analyzed in patients with high myopia after crossing the superficial temporal artery. A tendency to normalization of these parameters has been observed after surgery, due to improvement of the circulation in the orbital artery basin, as evidenced by ultrasonic dopplerography. The method of automated statistical perimetry was found valuable for predicting the functional results of surgery and for objective assessment of visual functions postoperation.
