---
title: Phosphenes
description: "Phosphenes are the perception of flashes, sparks, or patterns of light without actual light entering the eye. They arise from stimulation of the retina or visual pathways. ## Causes Triggers can be mechanical, electrical, or metabolic. - Rubbing or pressing…"
url: "https://bluefinvision.com/knowledge-base/topics/conditions-diseases/phosphenes/"
updated: "2025-12-17"
category: "Conditions & Diseases"
---

# Phosphenes

Phosphenes are the perception of flashes, sparks, or patterns of light without actual light entering the eye. They arise from stimulation of the retina or visual pathways.

## Causes

Triggers can be mechanical, electrical, or metabolic.

- Rubbing or pressing on closed eyes mechanically stimulates retinal cells
- Retinal traction or tears causing brief, peripheral flashes of light
- Migraine aura or occipital seizures producing complex visual patterns
- Side effects of certain medications or visual pathway disease

## When to seek help

Some phosphenes are benign, others need urgent review.

- Immediate assessment for new flashes with floaters or a curtain in vision to exclude retinal tear or detachment
- Neurological review if phosphenes accompany headache, weakness, or altered consciousness
- Routine eye check if symptoms are mild and longstanding but unexplained
- Documentation of frequency, duration, and associated factors aids diagnosis