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  2. Eye of a needle - Wikipedia

    en.wikipedia.org/wiki/Eye_of_a_needle

    The term "eye of a needle" is used as a metaphor for a very narrow opening. It occurs several times throughout the Talmud . The New Testament quotes Jesus as saying in Luke 18:25 that "it is easier for a camel to go through the eye of a needle than for a rich man to enter the kingdom of God" ( Jesus and the rich young man ); This is repeated in ...

  3. Micropsia - Wikipedia

    en.wikipedia.org/wiki/Micropsia

    Micropsia is a condition affecting human visual perception in which objects are perceived to be smaller than they actually are. Micropsia can be caused by optical factors (such as wearing glasses), by distortion of images in the eye (such as optically, via swelling of the cornea or from changes in the shape of the retina such as from retinal edema, macular degeneration, or central serous ...

  4. Myopia - Wikipedia

    en.wikipedia.org/wiki/Myopia

    The idea that myopia was caused by the eye strain involved in reading or doing other work close to the eyes was a consistent theme for several centuries. [101] In Taiwan, faced with a staggering rise in the number of young military recruits needing glasses, the schools were told to give students' eyes a 10-minute break after every half-hour of ...

  5. Strabismus - Wikipedia

    en.wikipedia.org/wiki/Strabismus

    Strabismus is an eye disorder in which the eyes do not properly align with each other when looking at an object. [2] The eye that is pointed at an object can alternate. [3] The condition may be present occasionally or constantly. [3] If present during a large part of childhood, it may result in amblyopia, or lazy eyes, and loss of depth ...

  6. Aniseikonia - Wikipedia

    en.wikipedia.org/wiki/Aniseikonia

    A way to demonstrate aniseikonia is to hold a near target (e.g., a pen or a finger) approximately 6 inches directly in front of one eye. The person then closes one eye, and then the other. The person should notice that the target appears larger to the eye that it is directly in front of.

  7. Epicanthic fold - Wikipedia

    en.wikipedia.org/wiki/Epicanthic_fold

    An epicanthic fold or epicanthus [6] is a skin fold of the upper eyelid that covers the inner corner (medial canthus) of the eye. [3] However, variation occurs in the nature of this feature and the possession of "partial epicanthic folds" or "slight epicanthic folds" is noted in the relevant literature.

  8. Retinal scan - Wikipedia

    en.wikipedia.org/wiki/Retinal_scan

    Pregnancy also affects the eyes. Likewise, indications of chronic health conditions such as congestive heart failure , atherosclerosis , and cholesterol issues first appear in the eyes. [ 10 ] Retinal scanning is sometimes confused with iris recognition , which has been employed for a wider scope of applications.

  9. Slit lamp - Wikipedia

    en.wikipedia.org/wiki/Slit_lamp

    Eye examination with the aid of a slit lamp. Side view of a slit lamp machine. Cataract in human eye: magnified view seen on examination with the slit lamp. In ophthalmology and optometry, a slit lamp is an instrument consisting of a high-intensity light source that can be focused to shine a thin sheet of light into the eye.