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Hunter syndrome is caused by a deficiency of the lysosomal enzyme iduronate-2-sulfatase (I2S). [2] [3] The lack of this enzyme causes heparan sulfate and dermatan sulfate to accumulate in all body tissues. [4] Hunter syndrome is the only MPS syndrome to exhibit X-linked recessive inheritance. [4] The symptoms of Hunter syndrome are comparable ...
Common causes include welding with failure to use adequate eye protection such as an appropriate welding helmet or welding goggles. This is termed arc eye, while photokeratitis caused by exposure to sunlight reflected from ice and snow, particularly at elevation, is commonly called snow blindness. [5]
Photophobia is a medical symptom of abnormal intolerance to visual perception of light. [1] As a medical symptom, photophobia is not a morbid fear or phobia, but an experience of discomfort or pain to the eyes due to light exposure or by presence of actual physical sensitivity of the eyes, [2] though the term is sometimes additionally applied to abnormal or irrational fear of light, such as ...
Diabetes, for example, is the leading cause of new cases of blindness in those aged 20–74, with ocular manifestations such as diabetic retinopathy and macular edema affecting up to 80% of those who have had the disease for 15 years or more.
A cast-iron ceiling fan made by Hunter, dating from the early 1980s. This model is called the "Original". The Hunter 'Original' (manufactured by the Hunter Fan Co.) is by far the most recognizable example of a cast-iron ceiling fan today. It has enjoyed the longest production run of any fan in history, dating from 1906 to the present day.
Leber's hereditary optic neuropathy (LHON) is the most frequently occurring mitochondrial disease, and this inherited form of acute or subacute vision loss predominantly affects young males. LHON usually presents with rapid vision loss in one eye followed by involvement of the second eye (usually within months).
Disease Cause Fish Affected Image Symptoms Treatment Neon tetra disease: Pleistophora hyphessobryconis (Microsporidia) Neon tetras, zebrafish, various aquarium fish Heavily infected fish appear emaciated and lethargic. Infection targets skeletal muscle, which will appear more opaque through the skin. Piscine tuberculosis: Mycobacterium marinum ...
Patients are often asymptomatic and the disease is often discovered through investigation of the cause of the heterochromia or cataract. Neovascularisation (growth of new abnormal vessels) is possible and any eye surgery, such as cataract surgery, can cause bleeding from the fragile vessels in the atrophic iris causing accumulation of blood in ...