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安裝中文字典英文字典辭典工具!
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- Photopsias - University of Iowa
Introduction Photopsias (i e , flashes) are a common presenting symptoms in the ophthalmology clinic Although the majority of photopsias are retinal in origin [1], characterizing the appearance, onset, and associated features is critical in determining the cause of these prominent yet diverse descriptions of "flashing lights " The following tutorial discusses the various sources of photopsia
- Ocular Migraine Phenomena - University of Iowa
Ocular Migraine Phenomena Photopsia (18 sec) This is an artist's rendering of photopsia The video was created for UIHC Department of Ophthalmology and Visual Sciences by Juan Carlos Nieto, Thomas A Weingeist, PhD, MD, and Michael Abramoff, MD, PhD These perceived flashes of light are relatively common symptoms There are many possible causes
- Atlas Entry - Normal fundus - adult
This is a color fundus photograph of a 35-year-old healthy patient The media are clear, providing a crisp view of the fundus The optic disc appears pink with sharp margins and a cup-to-disc ratio of approximately 0 35 The vasculature is normal in course and caliber The striated sheen radiating outward from the disc is evidence of a healthy retinal nerve fiber layer There are no lesions
- Visual Snow Syndrome - University of Iowa
Visual Snow Syndrome Ophthalmology Case Reports and Grand Rounds from the University of Iowa Department of Ophthalmology Visual Sciences
- Atlas Entry - Multiple evanescent white dot syndrome (MEWDS)
A 25-year-old male presented with 3 days of painless scotoma and photopsia in the left eye Amsler grid testing revealed an enlarged blindspot Fundus examination showed multiple subretintal white spots Fluorescein angiography showed classic punctate hyperfluorescence in a wreath-like pattern in the left eye (photo at bottom of page) A diagnosis of MEWDS was made
- Atlas Entry - Subconjunctival Hemorrhage
A subconjunctival hemorrhage occurs due to ruptured blood vessels in the conjunctiva The blood accumulates between the sclera and the conjunctiva and appears as a red spot on the white of the eye The bleeding can be caused by trauma, hypertension, elevated venous pressure (e g , Valsalva maneuver, coughing, vomiting), anticoagulant therapy, and acute hemorrhagic conjunctivitis [1] The most
- Acquired Peripheral Retinoschisis - University of Iowa
Acquired Peripheral Retinoschisis Table 2: Treatment options for Degenerative Retinoschisis based on severity of disease [10] Complications The rate of RS progression to symptomatic retinal detachment is estimated to be between 0 05% and 2 2% [6 ,8] However, this progression is responsible for roughly 3% of full retinal detachments overall It has been shown that those with a family history
- Idiopathic Intracranial Hypertension: pseudotumor cerebri
What are the typical symptoms of IIH? The symptoms most commonly reported by IIH patients followed by their frequency are: headache (94%) transient visual obscurations or blurring (68%) pulse synchronous tinnitus or "wooshing noise" in the ear (58%) pain behind the eye (44%) double vision (38%) visual loss (30%) pain with eye movement (22%) Headache Headache is present in nearly all patients
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