Visual field interpretation pdf

VFI is a global indicator of vision deterioration reflecting retinal ganglion cell loss with values ranging from 0-100% indicating a perimetrically blind eye to perfect vision. GHT measures the The key to interpreting Goldmann visual fields is to keep in mind the normal hill of vision ( figure 1) and how it compares with the patient's results. The skill is in identifying patterns and observing any change with repeated tests. This may require experience to be adept, though the following checklist may help ( figure 3 ): A neural network has been designed to classify visual field data from PC-based video-campimeters to facilitate diagnostic interpretation of visual field test results by non-experts, and suggests that neural networks incorporated into PC- based video- campimeters may enable correct interpretation of results in non-specialist clinics or in the community. The Computer Assisted Touch Screen (CATS 1 Field of view. All physical objects and light sources that form images on the retina at any particular moment, while fi xation is fi xed. 2 Visual fi eld. The perception of those objects and light sources by the visual cortex, after being processed by the visual pathway. This is subject to individual psycho-physical factors. Moustafa Yaqub data do not facilitate interpretation of the visual field. Colour or greyscale The colour scale aims to display sensitivity values in a map form in order that it can be more readily interpreted than numeric data (Figures 1 and 2). Ranges of sensitivity values are represented by different colours (dark Part 5 — Analysis of visual fields data Humphrey visual field interpretation pdf 1. Perimetry Md.Azizul Islam Junior Optometrist Ispahani Islamia Eye Institute & Hospital IIEI&H 2. Aims of today,s topic Will be able…. To know about various type of perimetry To identify field defect To recognize that field defect is due to glaucoma or neurological lesion To know that field defect The individual (or single field) printout (Fig. 17.1) contains a wealth of information to help clinicians decide whether the visual field is abnormal and specifically the likelihood of it being a glaucomatous visual field.The printout can be divided into four convenient parts to aid interpretation (Fig. 17.1). The visual pathway comprises the retina, optic nerve, optic chiasm, optic radiations, and the visual centre in the occipital lobe. Optic nerve lesions tend to cause ipsilateral monocular blindness. At the optic chiasm, fibres from the nasal half of the retina, corresponding to the temporal visual field, decussate. This article focuses on the interpretation and staging of visual fields as means by which to determine the amount of glaucomatous damage that a patient has suffered. GENERAL THOUGHTS When evaluating fields, I like to follow a checklist that I learned from Donald Budenz, MD, of the Bascom Palmer Eye Institute in Miami. The list is as follows: 1. Visual Field Defects. 38. What's the difference between a . depression. and a . scotoma? A . depression. is an inward shifting of the outer limit of the visual field, whereas a . scotoma. is an area of field loss surrounded on all sides by areas of normal sensitivity. Humphrey matrix visual field interpretation. What is humphrey visual field test. Figure 1 - Humphrey field analyzer Humphrey field analyzer (HFA) is a tool to measure the human field of view that is commonly used by optometrists, orthopaedics and ophthalmologists, in particular to detect the monocular field of view. [1] The other two 'fields' competencies I've always found strangely specific. They are 5.13 The ability to assess visual fields of patients with reduced visual acuity and 3.9 An understanding of the special examination needs of patients with severe visual field defects. Regarding 3.9 'severe visual field defects' for me would mean The other two 'fields' competencies I've always found strangely specific. They are 5.13 The ability to assess visual fields of patients with reduced visual acuity and 3.9 An understanding of the special examination needs of patients with severe visual field defects. Regarding 3.9 'severe visual field defects' for me would mean Edited by Thomas J Walsh, Published by Oxford University Press in cooperation with the American Academy of Ophthalmology, 2011, pp 311. The ability to choose and accurately interpret visual fields is an essential skill for all practising ophthalmologists. Current options available include everything from Amsler grid testing to automated perimetry with multiple different testing algorithms and 168 Chapter 9 | Interpretation of visual field progression ASSESSMENT OF GLOBAL VISUAL FIELD CHANGE CHANGE OF MEAN DEFECT (MD) AS A MEASURE OF GLOBAL CHANGE TREND ANALYSIS FOR THE VISUALIZATION OF CHANGE