The sodium-vapor lamp and its use for refraction.
D005123:Eye; D006801:Humans; D013508:Ophthalmologic Surgical Procedures; D055620:Optical Phenomena; D012029:Refraction, Ocular; D012964:Sodium; D014787:Vision Tests
D012964:Sodium
REFRACTION/sodium-vapor lamp; SODIUM-VAPOR LAMP/in eye refraction