Simple method of determining the axial length of the eye.
نویسندگان
چکیده
By photographing the corneal reflex in two positions of gaze and measuring the radius of curvature of the cornea it is possible to calculate the radius of rotation of the eye. The measurements obtained in this way showed a high correlation with refraction in a series of 80 eyes. The axial length obtained by this method was about 3 mm greater than that obtained by ultrasonographic or x-ray methods, and the reasons for the discrepancy are discussed.
منابع مشابه
Comparison of axial length of the eye in patients with diabetic retinopathy and non diabetics
Introduction: To compare the axial length of globe in patients with diabetic retinopathy with that in normal population and to evaluate its role in the progression of diabetic retinopathy. Methods: 150 patients with diabetic retinopathy in both eyes were compared with 150 age and sex matched non diabetic patients, referred to Motahari retina clinic of Shiraz, during fall 2000. The axial length...
متن کاملTo Estimate the Axial Elastic Modulus of Eye and Posterior Wall Thickness in Healthy Human Eye by Ultrasound Images and their Relation with Age and Gender
Introduction: Based on the invasive studies it has been shown that factors such as age, the progress of eye disorders, lens fibers compression and the biochemical changes of ocular matrix alter the physical characteristics and elastic properties of eye. In this study, a noninvasive method of estimating human eye elasticityis proposed and its relation with age and gender is evaluated using ultra...
متن کاملAxial and Posterior Wall Thickness Elastic Modulus of Eyes in Age-related Macular Degeneration (ARMD) Patients Compared to Healthy Individuals Using Ultrasound Images
Background & Aims: Age-related macular degeneration (ARMD) is one of the common retina disorders that can lead to loss of vision by increase in age. In this study, the efficacy of a non-invasive ultrasound technique for the evaluation of alastic properties of eye in the diagnosis of ARMD has been evaluated. Methods: For estimation of the elastic modulus of eye, spatial loading system designed a...
متن کاملتخمین غیرتهاجمی مدول الاستیک چشم کاتاراکته شده خرگوش
Although cataract is very common and its detection seems apparently easy especially in the mature cataract, its quantitative description to determine the critical value of diagnosis is too difficult. Non-invasive evaluation of the mechanical properties of eye is hampered by the absence of in-vivo methods for direct assessment of the axial length of eye, lens and cornea. In the present study...
متن کاملمقایسه دو روش بیومتری التراسوند (Ultrasound) و لنستار (Lenstar) در تعیین طول محور چشم و میزان عیب انکساری پس از عمل جراحی کاتاراکت
Background and Objective: Ocular biometry refers to the measurement of the axial length of the eye and thickness of the intraocular structures. This process is routinely performed for all patients before cataract surgery. The accuracy of the biometric data is directly associated with the refractive status after cataract surgery. Currently, two methods of biometry, namely ultrasound and optical ...
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 60 4 شماره
صفحات -
تاریخ انتشار 1976