Pseudomyopia - Gikinshi

Japanese: 偽近視 - ぎきんし
Pseudomyopia - Gikinshi

...When the degree of myopia becomes stronger, contact lenses are easier to use because they require a weaker degree of vision. When you continue to study, read, or do other activities that require looking at something close, the ciliary muscles become abnormally tense, causing a temporary state of myopia. This is sometimes treated as pseudomyopia (false myopia), but since myopia is caused by the relative elongation of the eye axis, it is rare for the condition to actually improve even with treatment.
[Hyperopia]
Hyperopia is a refractive condition in which parallel light rays form an image behind the retina due to a short eye axis or a strong refractive power of the cornea or lens.

*Some of the terminology explanations that mention "pseudomyopia" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…近視の度が強くなると,コンタクトレンズのほうが弱い度ですむので視力が出しやすい。勉強や読書など近方を見る作業を続けると,毛様体筋が異常に緊張して一時的に近視の状態になるが,これを偽近視(仮性近視)として治療が行われることもあるが,近視は眼軸が相対的に延長することによっておこるものであるから,実際に治療しても回復することは例外的である。
【遠視】
 遠視は眼軸が短いか,あるいは角膜や水晶体の屈折力が強いため,平行光線が網膜の後方で像を結ぶ屈折状態。…

※「偽近視」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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