Low Vision Prescription in Retinal Disease
Prof. of Optometry,Department of Optometry,Faculty of Paramedical Science, Mashhad University of Medical Sciences
Most epidemiological data shows the population of aged people with visual impairment is increasing. Depression is a common reaction seen within low vision patients. Those people who still have remaining vision feel more depressed since they always feel afraid that they may lose their vision totally. Family and social support have important role to decrease levels of depression in low vision patients.
Low vision according to quantity and quality is defined. Other definitions based on quality of life, employment and social welfare law is also given. Then clinical management of the range of conditions such as age related macular degeneration (AMD), retinitis pigmentosa (RP), diabetic retinopathy, glaucoma , cataract, and some retinal disease that cause visual impairment are explained. Symptoms and management of two type of AMD a ‘dry’ or ‘atrophic’ form and an exudative or ‘wet’ form has been explained. Visual rehabilitation and low vision aids for AMD patients can improve dramatically once they begin to focus attention on the degree of useful vision retained rather than the vision lost. For patient with both AMD and cataract, the Implantable Miniature Telescope (IMT) is a useful tool. The most difficulty of patient with glaucoma is mobility and driving due to oblivious to field loss.
In fact low vision management and use of aids in these people depends on age-related diseases. Some of them often do very well with hand magnifiers and illuminated stand magnifiers. For some people CCTV is valuable, which different types of them has been considered .It is important to measure refractive error and test distance and/or reading glasses because they often improve vision significantly. For people with particular age-related degeneration use of low vision aids may be invaluable. It should be noted that most low vision patients
cope well with their situation, particularly when the optometrist and practitioner give optimistic and best solution. Finally important factors in success for low vision people include family and social support and the patient’s general health and motivation.