Below are the main rubriks (i.e strongest indications or symptoms) of Kali Nitricum in traditional homeopathic usage, not approved by the FDA.
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Burning in eyes, with lachrymation and photophobia, agg. in morning, after washing with cold water.
Cloudiness of sight.
Coloured circles before eyes.
In evening, candles appear surrounded by a rainbow-like halo.
Everything appears black before eyes (after smelling Camphora Camphor).≡ more ...