Contrast Sensitivity Testing - University of Iowa
Oct 19, 2015 · Contrast sensitivity testing is similar to hearing testing. Slide 8. With a hearing test, different frequencies and decibel levels are tested to determine the full hearing abilities of the individual. Slide 9. In a similar way, contrast sensitivity testing evaluates vision over a range of spatial frequencies and contrast levels. Slide 10.
Visual Acuity Testing - University of Iowa
Oct 19, 2015 · Functional vision helps the clinician to understand how the patient’s vision affects their quality of life. This is because functional vision takes into account factors such as loss of contrast sensitivity, photophobia, and/or ocular motor problems. Slide 13 Here you see a variety of different visual acuity testing charts. Slide 14
Optical and Low Tech Devices - University of Iowa
May 9, 2021 · There are a wide variety of items to enhance the ability to do activities of daily living that have enhanced contrast. For example, items with white letters on a black background are often easier for individuals with vision loss to view. Slide 33. Lighting is the single most important factor in enhancing visual functioning.
Vision Rehabilitation: Overview - University of Iowa
Nov 20, 2017 · Slide 5. In keeping with the aforementioned definition of low vision, low vision rehabilitation may be necessitated by any condition, disease or injury that causes a visual impairment serious enough to result in functional limitations or disability. This means that there is no required amount of visual acuity or visual field loss necessary ...
Leber Hereditary Optic Neuropathy: - University of Iowa
Jun 25, 2013 · A 17-year-old male was referred to the University of Iowa Hospitals and Clinics (UIHC) Neuro-Ophthalmology Service by his local optometrist for evaluation of severe, painless, bilateral vision loss. Four months prior to presentation, the patient had normal uncorrected vision and passed his driver’s license vision screening.
Flicker Perimetry
Flicker Perimetry. The ability to detect intermittent light and dark alternations of a visual stimulus (flicker or temporal visual processing) is an important component of visual function throughout the field of view. Rapid changes in the luminance or contrast of a stimulus can be important for detecting environmental changes, motion, and ...
Idiopathic Orbital Myositis: A Treatment Algorithm - University of …
Jun 8, 2016 · The patient is a 19-year-old female who presents with a one-week history of headache, one day of left "eye swelling," and pain that is worse with eye movement. Additionally, she notes mild, horizontal binocular diplopia on side gazes and mild blurring of vision in the left eye. The right eye is unaffected.
Age-Related Macular Degeneration: From One Medical Student to …
Feb 26, 2018 · Age-Related Macular Degeneration (AMD) is the most common cause of blindness in the Western world. Currently it is estimated that about 2 million Americans are affected by AMD and by the year 2020 it is projected to be closer to 3 million as life expectancy increases and the aging population expands.[1]
Symptomatic Branch Retinal Artery Occlusion: An Under …
Apr 14, 2020 · In contrast, seventy-four percent of patients with CRAO present with vision worse than CF [1]. Fundoscopic exam of the affected eye may acutely demonstrate cotton wool spots. Within hours to days, retinal opacification (whitening) along the section of …
Spontaneous Retrobulbar Hemorrhage with Subsequent Orbital …
Apr 18, 2013 · Diagnosis is clinical and should be suspected in patients presenting with acute proptosis, rapid vision loss, ophthalmoplegia and fixed dilated pupils or RAPD, especially if there is recent trauma.[1,2] Perfusion of the central retinal artery can be assessed by applying digital pressure to the globe and evaluating how much pressure is required ...