Composition of the cohort according to ptosis aetiology
| Ptosis type | Number of patients |
|---|---|
| Myogenic | 269 (79%) |
| Simple levator maldevelopment (SLM) | 240 |
| SLM with elevator weakness (SLME) | 7 |
| Blepharophimosis | 18 |
| Other myopathy | 4 |
| Neurogenic | 37 (11%) |
| Jaw-wink | 26 |
| Oculomotor nerve palsy | 10 |
| Horner’s | 1 |
| Aponeurotic | 16 (5%) |
| Congenital | 12 |
| Post-traumatic | 4 |
| Mechanical | 6 (2%) |
| Neurofibromatosis | 4 |
| Other | 2 |
| Apparent | 2 (1%) |
| Syndrome related | 10 (3%) |