Common Causes of Ptosis
Ptosis can develop for various reasons and may occur on one or both sides. It is usually caused by stretching or thinning of the tendon between the levator muscle and the eyelid. When the tendon is stretched, the muscle has to work harder to lift the eyelid. This can lead to symptoms such as eyelid heaviness, forehead fatigue from over-compensation, and headaches. Recognising these helps in determining the most appropriate treatment approach.
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Nerve Conditions
Neurological disorders such as Horner’s syndrome or third nerve palsy can significantly impair eyelid function by interrupting the neural pathways that control muscle movement, leading to partial or complete inability to raise the eyelid.
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Congenital Ptosis
Present at birth, this condition occurs when the levator muscle responsible for lifting the eyelid fails to develop completely, leading to a drooping appearance from early childhood and potentially impacting visual development.
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Trauma
Physical injuries to the eyelid or surrounding orbital structures can cause direct damage to the levator muscle mechanism, disrupting its ability to lift the eyelid properly.
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Age-Related Degeneration
As individuals age, the levator muscle naturally weakens, causing gradual stretching of the muscle and resulting in a progressive drooping of the upper eyelid.
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Pseudoptosis
An apparent eyelid drooping caused by secondary factors like excessive skin, the presence of an underlying mass, or significant volume loss in the periorbital area.