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  2. Computer vision syndrome - Wikipedia

    en.wikipedia.org/wiki/Computer_vision_syndrome

    Computer vision syndrome. Computer vision syndrome ( CVS) is a condition resulting from focusing the eyes on a computer or other display device for protracted, uninterrupted periods of time and the eye's muscles being unable to recover from the constant tension required to maintain focus on a close object.

  3. Onan - Wikipedia

    en.wikipedia.org/wiki/Onan

    He wrote his Thoughts on the Sin of Onan (1767), which was reproduced as A Word to Whom it May Concern on 1779, as an attempt to censor a work by Samuel-Auguste Tissot. [36] In that writing, Wesley warned about "the dangers of self pollution", the bad physical and mental effects of masturbation, [ 37 ] [ 36 ] writes many such cases along with ...

  4. Retinal scan - Wikipedia

    en.wikipedia.org/wiki/Retinal_scan

    Retinal scan. A retinal scan is a biometric technique that uses unique patterns on a person's retina blood vessels. It is not to be confused with other ocular-based technologies: iris recognition, commonly called an "iris scan", and eye vein verification that uses scleral veins.

  5. Optical illusion - Wikipedia

    en.wikipedia.org/wiki/Optical_illusion

    Optical illusion is also used in film by the technique of forced perspective . Op art is a style of art that uses optical illusions to create an impression of movement, or hidden images and patterns. Trompe-l'œil uses realistic imagery to create the optical illusion that depicted objects exist in three dimensions.

  6. List of phobias - Wikipedia

    en.wikipedia.org/wiki/List_of_phobias

    The English suffixes -phobia, -phobic, -phobe (from Greek φόβος phobos, "fear") occur in technical usage in psychiatry to construct words that describe irrational, abnormal, unwarranted, persistent, or disabling fear as a mental disorder (e.g. agoraphobia), in chemistry to describe chemical aversions (e.g. hydrophobic), in biology to describe organisms that dislike certain conditions (e.g ...

  7. Eccentricity effect - Wikipedia

    en.wikipedia.org/wiki/Eccentricity_effect

    Eccentricity effect. The eccentricity effect is a visual phenomenon that affects visual search. As retinal eccentricity increases (i.e. the light of the image enters the eye at a larger angle and approaches peripheral vision), the observer is slower and less accurate to detect an item they are searching for. [ 1]

  8. Religious views on masturbation - Wikipedia

    en.wikipedia.org/wiki/Religious_views_on...

    That such an unnatural use (and so misuse) of one's sexual attribute is a violation of duty to oneself, and indeed one contrary to morality in its highest degree, occurs to everyone immediately, with the thought of it, and stirs up an aversion to this thought to such an extent that it is considered indecent even to call this vice by its proper ...

  9. Eye strain - Wikipedia

    en.wikipedia.org/wiki/Eye_strain

    Eye strain, also known as asthenopia (from Greek a-sthen-opia, Ancient Greek: ἀσθενωπία, transl. weak-eye-condition ), is a common eye condition that manifests through non-specific symptoms such as fatigue, pain in or around the eyes, blurred vision, headache, and occasional double vision. [ 1] Symptoms often occur after long-term use ...