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  2. Evolution of the eye - Wikipedia

    en.wikipedia.org/wiki/Evolution_of_the_eye

    Many examples of wavelength-specific behaviors have been identified, in two primary groups: Below 450 nm, associated with direct light, and above 450 nm, associated with reflected light. [46] As opsin molecules were tuned to detect different wavelengths of light, at some point color vision developed when the photoreceptor cells used differently ...

  3. Iowa History Month: How Kenneth Jernigan transformed ... - AOL

    www.aol.com/iowa-history-month-kenneth-jernigan...

    Iowa has long been recognized as innovative with respect to the blind, seeing the need to enable the blind to compete on a footing of equality. Iowa History Month: How Kenneth Jernigan transformed ...

  4. Cultural depictions of blindness - Wikipedia

    en.wikipedia.org/wiki/Cultural_depictions_of...

    The theme of blindness has been explored by many different cultures throughout history, with blind characters appearing in stories from ancient Greek mythology and Judeo-Christian religious texts. In the modern era, blindness has featured in numerous works of literature and poetry by authors such as William Shakespeare , William Blake , and H ...

  5. Hemeralopia - Wikipedia

    en.wikipedia.org/wiki/Hemeralopia

    Hemeralopia or day blindness is the inability to see clearly in bright light and is the exact opposite of nyctalopia (night blindness), the inability to see clearly in low light. [1] It is also called heliophobia. [2] It can be described as insufficient adaptation to bright light.

  6. List of time periods - Wikipedia

    en.wikipedia.org/wiki/List_of_time_periods

    Modern history – After the post-classical era Early modern period – The chronological limits of this period are open to debate. It emerges from the Late Middle Ages (c. 1500), demarcated by historians as beginning with the fall of Constantinople in 1453, in forms such as the Italian Renaissance in the West, the Ming dynasty in the East, and ...

  7. Timelines of modern history - Wikipedia

    en.wikipedia.org/wiki/Timelines_of_modern_history

    The following are timelines of modern history, from the end of the Middle Ages, c. 1400 – c. 1500, [1] to the present. General timelines. Early modern period For a ...

  8. Visual impairment - Wikipedia

    en.wikipedia.org/wiki/Visual_impairment

    The word "blind" (adjective and verb) is often used to signify a lack of knowledge of something. For example, a blind date is a date in which the people involved have not previously met; a blind experiment is one in which information is kept from either the experimenter or the participant to mitigate the placebo effect or observer bias.

  9. Timelines of world history - Wikipedia

    en.wikipedia.org/wiki/Timelines_of_world_history

    These timelines of world history detail recorded events since the creation of writing roughly 5000 years ago to the present day. For events from c. 3200 BC – c. 500 see: Timeline of ancient history; For events from c. 500 – c. 1499, see: Timeline of post-classical history; For events from c. 1500, see: Timelines of modern history