Diffuse superficial keratitis

...When exposed to large amounts of ultraviolet light during skiing or mountain climbing in snowy weather, the condition usually develops after a 6-10 hour latent period, followed by sudden symptoms such as photophobia (sensitivity to light), tearing, foreign body sensation, and eye pain. It is called "snow blindness" or colloquially "snow blindness." It is caused by ultraviolet light reflected from the snow surface attacking the conjunctiva and cornea, and in addition to the above subjective symptoms, there is severe swelling and congestion of the bulbar conjunctiva, and diffuse superficial keratitis. As for treatment, if you avoid ultraviolet light and keep your eyes at rest, the condition will heal naturally within a few days.

*Some of the terminology that refers to "diffuse superficial keratitis" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…スキーや積雪期登山などに際し大量の紫外線にさらされたとき，通常6～10時間の潜伏期をおいて急激に羞明（しゆうめい）(まぶしがること)，流涙，異物感，眼痛等をおこすものをいい，〈雪盲〉，また俗に〈雪目〉ともいう。雪面から反射した紫外線が結膜や角膜を侵すためで，上記の自覚症状のほか，球結膜の浮腫，充血が強く，また瀰漫（びまん）性表層角膜炎diffuse superficial keratitisが認められる。治療法は，紫外線をさけ，眼を安静にしていれば，数日以内に自然に治る。…

※「diffuse superficial keratitis」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