From: Clinical and surgical data of affected members of a classic CFEOM 1 family
| Clinical Feature | Frequency Observed |
|---|---|
| Restrictive Ophthalmoplegia (positive forced duction tests) | Required |
| Congenital | Required |
| Non-progressive | Required |
| Inelasticity and decreased contractility of one or more extraocular muscles | Required |
| Ptosis, unilateral or bilateral | Very Common |
| Downward deviation of eyes and retroflexion of head | Very Common |
| Normal pupillary function | Very Common |
| Inexpressive Facies | Very Common |
| Reduced visual acuity | Common |
| Astigmatism | Common |
| Nystagmus | Common |
| Inelastic and fragile conjunctiva | Common |