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  2. Upside down goggles - Wikipedia

    en.wikipedia.org/wiki/Upside_down_goggles

    Upside down goggles can be used to demonstrate human adaptation to inverted vision, and as a method of preventing motion sickness. [2] Hubert Dolezal recommended using upside down goggles for "nausea adaptation" for space travel. [3] They can also be used to train spatial abilities and possibly cognitive functions. [Patents of devices 1]

  3. Achromatic lens - Wikipedia

    en.wikipedia.org/wiki/Achromatic_lens

    Achromatic lenses are corrected to bring two wavelengths (typically red and blue) into focus on the same plane. ... which is composed of two individual lenses made ...

  4. Farsightedness - Wikipedia

    en.wikipedia.org/wiki/Farsightedness

    Manifest hyperopia: It is the amount of hyperopia not corrected by ciliary tone. Manifest hyperopia is further classified into two, facultative and absolute. Facultative hyperopia: It is the part of hyperopia corrected by patient's accommodation. Absolute hyperopia: It is the residual part of hyperopia which causes blurring of vision for distance.

  5. Aniseikonia - Wikipedia

    en.wikipedia.org/wiki/Aniseikonia

    Aniseikonia is an ocular condition where there is a significant difference in the perceived size of images. It can occur as an overall difference between the two eyes, or as a difference in a particular meridian. [1]

  6. Graves' disease - Wikipedia

    en.wikipedia.org/wiki/Graves'_disease

    Severe cases threatening vision (corneal exposure or optic nerve compression) are treated with steroids or orbital decompression. In all cases, cessation of smoking is essential. Double vision can be corrected with prism glasses and surgery (the latter only when the process has been stable for a while).

  7. Computer vision syndrome - Wikipedia

    en.wikipedia.org/wiki/Computer_vision_syndrome

    A 2021 review investigated suggested therapies for CVS and found little supporting evidence for the following: switching to bi- or multi-focal glasses to reduce eye strain, or using glasses that block blue light. The same review reported "low-certainty" in omega-3 supplements as a method to combat CVS. [10]

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