The importance of measuring contrast sensitivity in cases of visual disturbance.
نویسنده
چکیده
A description is given of a practical clinical test of contrast sensitivity and of the results obtained on a normal population. An account is given of recent physiological work which illustrates the potential usefulness of the method in ophthalmology, and the clinical results obtained by the author and others are summarised.
منابع مشابه
بررسی نقش ابتلا به تالاسمی در اختلال آستانه کانتراست بینایی
Background and purpose: Threshold contrast sensitivity could be considered as an important indicator of visual function in thalassemic patients. In this study the threshold of contrast sensitivity was investigated in patients with major and minor thalassemia and normal individuals. Material & methods: This cross-sectional study was conducted in 30 patients of thalassemia major (Desferal depen...
متن کاملبررسی مقایسه‌ای حدت بینایی و حساسیت به کنتراست در رانندگان مراجعه‌کننده به درمانگاه چشم بیمارستان فرشچیان همدان
Background and Objective: Car accidents are the second leading cause of mortality in Iran. For safe driving, drivers require minimum acceptable visual acuity. In Iran, the accepted routine test to take driving license is Snellen vision chart, which is not adequate for visual acuity determination in real and natural environment. It seems that introducing a more sensitive and specific screening t...
متن کاملA Quantitative Investigation on the Effect of Edge Enhancement for Improving Visual Acuity at Different Levels of Contrast
Background: The major limitation in human vision is refractive error. Auxiliary equipment and methods for these people are not always available. In addition, limited range of accommodation in adult people when switching from a far point to a near point is not simply possible. In this paper, we are looking for solutions to use the facilities of digital image processing and displaying to improve ...
متن کاملRelationship between Visual Impairments and Motor Problems Children 3-6 Age with Low Birth Weight
Abstract Birth weight is one of the most important indicators of neonatal health in any society and is considered as the best tool to measure the outcome of pregnancy and the most important factor in determining the incidence of disease or death of the infant. The purpose of this study was to investigating relationship between visual impairments and motor problems in children 3-6 age with ve...
متن کاملEvaluation of Visual Signs and Symptoms in Patients with Alzheimer's Disease
Background and Objective:Patients with Alzheimer's disease have impaired visual function even in the early stages of the disease. Therefore, the present study aimed to determine the visual signs and symptoms in patients with Alzheimer's disease and compare them with those in the control group. Materials and Methods:This cross-sectional descriptive study was conducted on 19 Alzheimer patients a...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید
ثبت ناماگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید
ورودعنوان ژورنال:
- The British journal of ophthalmology
دوره 62 4 شماره
صفحات -
تاریخ انتشار 1978