DOCTORS'
Medical Case Studies
DOCTORS'
Medical Case Studies
Measurement of visual acuity
Visual acuity
Visual acuity (VA) is acuteness or clearness of vision, which is dependent on the sharpness of the retinal focus within the eye and the sensitivity of the interpretative faculty of the brain. Visual acuity is a measure of the spatial resolution of the visual processing system and is usually tested in a manner to optimise and standardise the conditions. To this end, black symbols on a white background are used and a sufficient distance allowed to approximate infinity in the way the lens attempts to focus. Twenty feet, or six metres, is essentially infinity from an optical perspective (the difference in optical power required to focus at 20 feet versus infinity is only 0...
Measurement of visual acuity - List of case studies
- Neurofibromatosis type 1 - Ophthalmologic Exam is recommended
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and optic glioma. Visual evoked potentials showed evidence of bilateral functional deficit. ... exam by the pediatric ophthalmologist, specifically measurement of visual acuity or assessment of visual fields . Such data ...
- Optic Neuropathy
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exotropia secondary to the profound vision loss of the left eye . The vision loss appears to be to an optic neuropathy . ... repeated. It is critically important to have an accurate measurement of the opening pressure . 5. NMO antibodies are pending ...
- Child suffering from NF-1 and optic nerve glioma
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5-year-old boy with diagnosis of neurofibromatosis type 1 underwent ophthalmological evaluation that showed picture of slight reduction in visual acuity of the right eye and severe hypovision of the left eye with ... or acuity (i.e., acuity less than the United States measurement of 20/40-20/50 OU), then we would commence ...
- Diabetes Mellitus Type II, Dyslipidemia, Diabetic Retinopathy
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69-year-old male suffers of diabetes complicated by neuropathy and retinopathy. He had uveitis and ... No details were provided regarding the visual acuity, recent ophthalmic exam, or recent imaging studies. In the ... Perform a complete ophthalmic exam including measurement of visual acuity, intraocular pressure, and ...
- NF-1 and optic nerve glioma – additional opinion
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5-year-old boy with diagnosis of neurofibromatosis type 1 underwent ophthalmological evaluation that showed ... or acuity (i.e., acuity less than the United States measurement of 20/40-20/50 OU), then yes, I would definitely commence ...
- List of Examinations
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Below is a full list of the examinations mentioned in case studies throughout the site. click on ... Assessment of the extramyramidal system Assessment of visual fields Audiogram Audiometric exam Audiometric examination ... testing Maximal motor nerve conduction velocity Measurement of Tau protein Measurement of the opening pressure (spinal ...