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The majority of people with poor vision are in the developing world and are over the age of 50 years. [1] Rates of visual impairment have decreased since the 1990s. [ 1 ] Visual impairments have considerable economic costs both directly due to the cost of treatment and indirectly due to decreased ability to work.
Frailty or frailty syndrome refers to a state of health in which older adults gradually lose their bodies' in-built reserves and functioning. This makes them more vulnerable, less able to recover and even apparently minor events (infections, environmental changes) can have drastic impacts on their physical and mental health.
Amblyopia, also called lazy eye, is a disorder of sight in which the brain fails to fully process input from one eye and over time favors the other eye. [1] It results in decreased vision in an eye that typically appears normal in other aspects. [1]
Post-exertional malaise; Other names: Post-exertional symptom exacerbation (PESE) Postexertional malaise (PEM) Post-exertional neuroimmune exhaustion (PENE) Chart of physical, cognitive, and emotional activities that may trigger PEM: Symptoms: Worsening of symptoms after ordinary activity: Causes: Myalgic Encephalomyelitis/Chronic Fatigue Syndrome
In some people, the external optics may have the greater influence, and in other people, the internal optics may predominate. Importantly, the axes and magnitudes of external and internal astigmatism do not necessarily coincide, but it is the combination of the two that by definition determines the overall optics of the eye.
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Sixth nerve palsy causes the associated eye to deviate inward and has many causes due to the relatively long path of the nerve. Increased cranial pressure can compress the nerve as it runs between the clivus and brain stem. [27] [page needed] [28] [29] [30] Evidence indicates a cause for strabismus may lie with the input provided to the visual ...
Episodes of vasovagal syncope are typically recurrent and usually occur when the predisposed person is exposed to a specific trigger. Before losing consciousness, the individual frequently experiences early signs or symptoms such as lightheadedness, nausea, the feeling of being extremely hot or cold (accompanied by sweating), ringing in the ears, an uncomfortable feeling in the heart, fuzzy ...