Which visual phenomenon is associated with Digoxin use?

Digoxin is a cardiac glycoside primarily used to treat heart conditions such as atrial fibrillation and heart failure. One of the visual phenomena associated with Digoxin use is entoptic phenomena, often described as "snowy vision" or "flickering." This effect arises due to the drug's action on the central nervous system and its potential to affect the retinal function.

Entoptic phenomena are visual disturbances that originate from within the eye itself, rather than from external stimuli. When patients report a "snowy vision," they are typically describing experiencing visual "snow" or flickering lights that can vary in intensity and frequency. This can be attributed to the effects of Digoxin on the retinal cells or possible disturbances in the nerve pathways involved in vision.

Understanding that this side effect is specifically linked to the use of Digoxin and how it alters visual perception helps to recognize the potential complications and encourage monitoring of patients on this medication.