Robert L. Yolton

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Diabetic Retinopathy is a progressive ocular disease. The disease may advance from mild to severe non-proliferative Diabetic Retinopathy. This paper proposes a method for automated detection and classification of vascular abnormalities in Diabetic Retinopathy. The vascular abnormalities are detected using scale and orientation selective Gabor filter banks.(More)
BACKGROUND A systematic approach to determining drug intoxication has been developed for use by police officers. By considering specific physiological signs, trained officers can detect the effects of seven major drug types. METHODS Officers follow a 12-step testing sequence and evaluate signs such as pupil sizes and responses, eye movements, heart rate,(More)
BACKGROUND Hyperbaric oxygen therapy (HBOT) involves exposing patients to elevated oxygen pressures and concentrations for the treatment of soft tissue degenerative diseases. As side effects, some patients experience cataract development and/or a significant increase in myopia. SUBJECTS Eight subjects participated in this project. All were receiving HBOT(More)
The oculocardiac reflex (OCR), which may result from traction or pressure on the globe, orbital contents, or extra ocular muscles, has been associated with cardiac arrests during ocular surgery. The pathways for this reflex have been established and several preventive methods including retrobulbar block and intravenous injection of atropine have been(More)
The P-300 event-related brain potential was monitored during simulated traffic signal tasks for 10 subjects who were tested at three levels of mean blood alcohol content: 0.00%, 0.06%, and 0.13%. A significant increase in latency occurred for the 0.13% level indicating that an increased mental processing time was required to determine if a red or a green(More)
BACKGROUND Most personal defense sprays contain o-chlorobenzylidene malononitrile (CS), w-chloroacetophenone (CN), oleoresin capsicum (OC), or a combination of these ingredients as the active agent. They are designed to incapacitate by causing acute ocular irritation, lacrimation, conjunctivitis, blepharospasm, and mild to moderate respiratory distress. (More)
BACKGROUND Two major reference works suggest that men and women blink spontaneously at different rates, but they disagree with regard to which gender blinks faster. METHODS Spontaneous blink rates of 59 males and 86 females, 44 of whom were taking birth control (BC) pills, were measured for 5 consecutive minutes. Schirmer test results and tear break-up(More)
The process of determining acuities from visual evoked responses (VER's) was computer modeled. Based on amplitude variability data from earlier studies, the reliability and validity of the acuity determinations for normal subjects were assessed. For subjects who had poor quality VER data [low signal-to-noise (S/N) ratios], considerable variability and an(More)
BACKGROUND Age-related macular degeneration (ARMD) is a major cause of blindness in the elderly. Unfortunately, no proven form of treatment is currently available for the dry, atrophic form of ARMD seen in more than 90 percent of patients with this condition. METHODS A recent theory suggests that ARMD is associated with damage to the retina caused by free(More)