Ptosis is a medical term that refers simply to a droop. For example, if the eyebrow is droopy upper eyelid, the proper medical term is blepharoptosis.
But, as droopy user eyelids are much more common than droopy brows, when eye doctors use the term ptosis, they are generally referring to a droopy upper eyelid.
In the specific definition of ptosis, the distance between the light reflex in the centre of the eye(the reflection in the centre of the pupil when light is shone at the eye) and the upper eyelid margin must be less than 2mm. The normal upper eyelid margin lies about 3 to 4mm from the centre of the pupil.
Aponeurotic ptosis is usually due to daily wear and tear and is more common in older individuals.
This type of acquired lid droop is due to stretching of the terminal end of the elevating muscle of the eyelid (levator palpebrae superioris / LPS) or complete detachment of the LPS from the tarsal plate, a firm structure within the eyelid which supports the eyelashes. Aponeurotic ptosis can be corrected surgically.
Congenital ptosis is where a child is born with a lid droop. This may be present on one side or both sides. It is due to the LPS not developing in the normal way.
Surgery for this is available but certain trade-offs are inherent in this surgery and parents have to be counselled on these prior to surgery. Sometimes, the lid droop is associated with a wink and the surgical options have to be carefully considered.
Congenital ptosis may occur as part of a syndrome known as blepharosphimosis syndrome. In this situation, other abnormalities are present and have to be considered together with the ptosis problem.
Medical diagnosis of ptosis condition
Before and after pictures of ptosis surgery
Detailed procedure pathway
Detailed breakdown of the cost of ptosis surgery
Whether patient’s ptosis condition qualifies under Medisave/medical insurance coverage (if applicable)