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The pupil of the human eye can range in size from 2 mm to over 8 mm to adapt to the environment. The human eye can detect a luminance from 10 −6 cd/m 2, or one millionth (0.000001) of a candela per square meter to 10 8 cd/m 2 or one hundred million (100,000,000) candelas per square meter.
Surgical experiments Throughout the 1840s, J. Marion Sims, who is often referred to as "the father of gynecology," performed surgical experiments on infants, enslaved African women, and girls as young as 13 without anesthesia for the treatment of conditions including vesicovaginal fistula, Neonatal tetanus, and other similar conditions. The patients—one of whom was operated on 30 times ...
Conjunctival cancer (of the layer that lines the inner part of eyelids and the white part of the eye) is also more common in those with HIV. Additionally, people with AIDS frequently have systemic symptoms such as prolonged fevers, sweats (particularly at night), swollen lymph nodes, chills, weakness, and unintended weight loss.
Demography of the Philippines records the human population, including its population density, ethnicity, education level, health, economic status, religious affiliations, and other aspects. The Philippines annualized population growth rate between the years 2015–2020 was 1.53%. [6] According to the 2020 census, the population of the ...
Tigers and other exotic animals were mainly used for the entertainment of elites but from the 19th century onward, they were exhibited more to the public. Tigers were particularly big attractions and their captive population soared. In 2020, there were over 8,000 captive tigers in Asia, over 5,000 in the US and no less than 850 in Europe.
Ophthalmology ( / ˌɒfθælˈmɒlədʒi /, OFF-thal-MOL-ə-jee) [1] is a clinical and surgical specialty within medicine that deals with the diagnosis and treatment of eye disorders. [2] A former term is oculism . An ophthalmologist is a physician who undergoes subspecialty training in medical and surgical eye care. [3]
It affects more than 7 million people over the age of 65. Yet the proportion of older Americans with dementia actually declined from 13% in 2011 to 10% in 2019, according to the Population ...
Frequency. 60 million (2015) [6] A cataract is a cloudy area in the lens of the eye that leads to a decrease in vision of the eye. [1] [7] Cataracts often develop slowly and can affect one or both eyes. [1] Symptoms may include faded colours, blurry or double vision, halos around light, trouble with bright lights, and difficulty seeing at night ...