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Index: Age related changes in refractive index (cortical sclerosis) can cause hypermetropia. Another cause of index hypermetropia is diabetes. [2] Occasionally, mild hypermetropic shift may be seen in association with cortical or subcapsular cataract also. [12] Positional: Positional hypermetropia occur due to posterior dislocation of Lens or ...
While the common theories regarding vision issues during flight focus on cardiovascular factors (fluid shift, intracranial hypertension, CO 2 exposure, etc.), the difficulty comes in trying to explain how on any given mission, breathing the same air and exposed to the same microgravity, why some crewmembers have vision issues while others do ...
Children are typically born hyperopic and shift toward emmetropia or myopia as their eyes lengthen through childhood. [17] Other terminology include anisometropia, when the two eyes have unequal refractive power, [18] and aniseikonia which is when the magnification power between the eyes differ. [19]
Diabetic retinopathy (also known as diabetic eye disease) is a medical condition in which damage occurs to the retina due to diabetes.It is a leading cause of blindness in developed countries and one of the lead causes of sight loss in the world, even though there are many new therapies and improved treatments for helping people live with diabetes.
Type 1 diabetes affects about 400,000 people in the UK, including more than 29,000 children. Skip to main content. Sign in. Mail. 24/7 Help. For premium support please call: 800-290-4726 more ...
Diabetes also publishes abstracts presented at the ADA's annual meeting, Scientific Sessions, as a supplement. According to the Journal Citation Reports , the journal has a 2021 impact factor of 9.337, and a 5 years impact factor of 10.509 ranking it 8th out of 240 journals in the category "Endocrinology, Diabetes & Metabolism".
Central serous chorioretinopathy (CSC or CSCR), also known as central serous retinopathy (CSR), is an eye disease that causes visual impairment, often temporary, usually in one eye. [ 1 ] [ 2 ] When the disorder is active it is characterized by leakage of fluid under the retina that has a propensity to accumulate under the central macula.
Several mechanisms may explain the increase in the amount of higher-order aberrations with conventional excimer laser refractive procedures: a change in corneal shape toward oblateness or prolateness (after myopic and hyperopic ablations respectively), insufficient optical zone size and imperfect centration.