| Features | Preseptal cellulitis | Orbital Cellulitis |
|---|---|---|
| Pain | yes | no |
| Fever | may be there | may be there |
| Periorbital oedema,rise of temp,tenderness | yes | yes |
| Proptosis | No | yes |
| Restricted ocular movement | No | yes |
| Chemosis | No | yes |
| Diminished vision | No | yes |
| Afferent pupillary defect | No | Yes |
| Optic nerve head swelling | No | yes |
| Retinal Pathology | Affected layers of retina |
|---|---|
| Microaneurysm | Inner nuclear layer |
| Hard exudates | Outer plexiform layer |
| Soft Exudates/CWS | Nerve fibre layer |
| Superficial Haemorrhage | Nerve fibre layers |
| Deep (Dot & Blot )Haemorrhages | Outer plexiform/Inner nuclear layer |
| Retinal Oedema | Between outer plexiform layer & Inner nuclear layer |
| Congenital Retinoschisis | Separation occurs in Retinal nerve fibre layer |
| Acquired Retinoschis | Separation occurs in Outer plexiform layer |