Although many individuals with a central scotoma develop eccentric fixation most often beneath or left of the scotoma, little is known about how they come to develop a particular viewing strategy. We investigated this by asking eight subjects with normal vision to read isolated letters, words and text passages while an artificial scotoma covered a central portion of the visual field. We quantif...

People with a central scotoma often adopt an eccentric retinal location (Preferred Retinal Locus, PRL) for fixation. Here, we proposed a novel training paradigm as a model system to study the nature of the PRL formation and its impacts on visual function. The training paradigm was designed to effectively induce a PRL at any intended retinal location by integrating oculomotor control and pattern...

AIMS/BACKGROUND The basis of binocular single vision in microtropia remains a matter of contention. This paper discusses the implications of recovery, in a group of primary microtropes following treatment, in relation to current concepts on the aetiology of the condition and proposed retinocortical correspondence. METHODS Nine previously untreated primary microtropes whose condition resolved,...

We report a method to train individuals with central field loss due to macular degeneration to improve the efficiency of visual search. Our method requires participants to make a same/different judgment on two simple silhouettes. One silhouette is presented in an area that falls within the binocular scotoma while they are fixating the center of the screen with their preferred retinal locus (PRL...

This study addresses the importance of salience placement before or after scotoma development for an efficient target allocation in visual field. Pre-allocation attention is a mechanism known to induce better gaze positioning towards target. Three different conditions were tested: simulated central scotoma, augmentation surrounding and baseline condition without any simulation. All investigated...

Introduction Many medical indications for orbital decompression exist in patients with Graves‘ orbitopathy (GO) of which the dysthyroid optic neuropathie (DON) is rather severe and has to be urgently treated. The neuropathy nerve commonly caused by swelling extraocular muscle tissue resulting a compression area apex orbitae or stretching proptosis. Most common symptoms include decreased color s...

Dear Editor, We are very grateful to Professor Daroff, as well to our patients, for their goodwill in sharing with us their experience of aura. The letter by Professor Daroff (1) is a nice example of the fact that, in spite of contemporary technology, description of symptoms is the first and necessary step to answer the questions ‘why’ and ‘how’. We are in line with Professor Daroff when it com...

Electronic aids for the visually impaired using head mounted display devices were proposed by many and a few attempts at implementation have even made it to the market. Existing products provided mostly magnification and standard video contrast control. These products had only limited success and are usually not recommended for use in mobility. Other prototype devices provided image enhancement...

PURPOSE We used scanning laser ophthalmoscope (SLO) microperimetry to evaluate scotomas in patients with clinically significant diabetic macular edema (CSME) in type 2 diabetes mellitus. METHODS We studied 19 patients (mean age = 63 years; range, 45-78 years) (19 eyes). SLO microperimetry was performed in all eyes. We divided patients into three groups as follows: dense scotoma, relative scot...