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  2. Ocular hypertension - Wikipedia

    en.wikipedia.org/wiki/Ocular_hypertension

    It is estimated that approximately 2-3% of people aged 52-89 years old have ocular hypertension of 25 mmHg and higher, and 3.5% of people 49 years and older have ocular hypertension of 21 mmHg and higher. [4] [5] Elevated intraocular pressure is an important risk factor and symptom of glaucoma. Accordingly, most individuals with consistently ...

  3. Glaucoma - Wikipedia

    en.wikipedia.org/wiki/Glaucoma

    A study with 1636 persons aged 40-80 who had an intraocular pressure above 24 mmHg in at least one eye, but no indications of eye damages, showed that after five years, 9.5% of the untreated participants and 4.4% of the treated participants had developed glaucomatous symptoms, meaning that only about one in 10 untreated people with elevated ...

  4. Blurred vision - Wikipedia

    en.wikipedia.org/wiki/Blurred_vision

    Cataracts: Cloudiness over the eye's lens, cause blurring of vision, halos around lights, and sensitivity to glare. [5] It is also the main cause of blindness worldwide. [2] Glaucoma: Increased intraocular pressure (pressure in the eye) cause progressive optic neuropathy that leads to optic nerve damage, visual field defects and blindness. [6]

  5. Dry eye syndrome - Wikipedia

    en.wikipedia.org/wiki/Dry_eye_syndrome

    Aging is one of the most common causes of dry eyes because tear production decreases with age. [4] Several classes of medications (both prescription and OTC) have been hypothesized as a major cause of dry eye, especially in the elderly. Particularly, anticholinergic medications that also cause dry mouth are believed to promote dry eye. [25]

  6. Intraocular pressure - Wikipedia

    en.wikipedia.org/wiki/Intraocular_pressure

    Intraocular pressure (IOP) is the fluid pressure inside the eye. Tonometry is the method eye care professionals use to determine this. IOP is an important aspect in the evaluation of patients at risk of glaucoma. [1] Most tonometers are calibrated to measure pressure in millimeters of mercury .

  7. Idiopathic intracranial hypertension - Wikipedia

    en.wikipedia.org/wiki/Idiopathic_intracranial...

    A small percentage of people may require surgery to relieve the pressure. [2] About 2 per 100,000 people are newly affected per year. [4] The condition most commonly affects women aged 20–50. [2] Women are affected about 20 times more often than men. [2] The condition was first described in 1897. [1]

  8. Adaptation (eye) - Wikipedia

    en.wikipedia.org/wiki/Adaptation_(eye)

    The human eye can function from very dark to very bright levels of light; its sensing capabilities reach across nine orders of magnitude. This means that the brightest and the darkest light signal that the eye can sense are a factor of roughly 1,000,000,000 apart. However, in any given moment of time, the eye can only sense a contrast ratio of ...

  9. Presbyopia - Wikipedia

    en.wikipedia.org/wiki/Presbyopia

    Results are, however, more variable and some people have a decrease in visual acuity. [17] Concerns with refractive surgeries for presbyopia include people's eyes changing with time. [16] Other side effects of multifocal corneal ablation include postoperative glare, halos, ghost images, and monocular diplopia. [18]

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