How to Recognize Retinal Detachment
Nov 17, 2025
Source: Cainiu Health
Dr. Wang Shuai
Introduction
Retinal detachment can generally be recognized by observing floating dark shadows in front of the eyes, noticing a sense of obstruction in the visual field, or detecting a sudden decline in vision. A sudden appearance of numerous dark spots resembling floaters—presenting as dots, lines, or絮状 (cloud-like) shapes—is characteristic, with the number of floaters gradually increasing and moving in irregular directions. These symptoms are particularly noticeable when looking at bright backgrounds, such as white walls or the blue sky.
Retinal detachment can generally be recognized by observing floating black spots in the vision, noticing visual field obstruction, detecting sudden vision loss, paying attention to visual distortion, and being alert to the appearance of flashes. Specific details are as follows:
1. Observe floating black spots: A sudden increase in floaters resembling flying insects—appearing as dots, lines, or絮-like shapes—with progressively increasing numbers and irregular movement patterns, especially noticeable when looking at bright backgrounds (such as white walls or the blue sky), may indicate an early sign of retinal detachment.
2. Notice visual field obstruction: A fixed blind spot or shadow appears in a specific area of the visual field, similar to a curtain or dark shade blocking vision. The obstructed area may gradually expand from the periphery of the visual field toward the center, making objects in that region impossible to see clearly. This sensation does not disappear with eye movement.
3. Detect sudden vision decline: Vision deteriorates noticeably within a short period, resulting in blurred vision. Some individuals may experience continuously worsening clarity, and vision cannot be restored even by adjusting their visual habits. In severe cases, vision loss may occur within hours or days.
4. Pay attention to visual distortion: When viewing straight objects (such as door frames or power lines), the edges appear bent or distorted, or changes in size and shape occur—for instance, straight lines may seem bulged or indented. This is one of the typical signs of retinal detachment affecting image formation in the eye.
5. Be alert to flashes of light: Brief flashes resembling lightning or sparks suddenly appear in the field of vision, particularly during eye movement. These flashes may occur in one eye or both eyes simultaneously and may recur frequently, especially noticeable in dim lighting or during large eye movements.
If any of the above symptoms occur, immediately stop strenuous activities, avoid external impact to the eye, and promptly seek evaluation and treatment at a qualified ophthalmology clinic.
