| GAPO | growth retardation, alopecia, pseudo-anodontia, and optic atrophy [syndrome] |
|---|---|
| GOND | glaucomatous optic nerve damage |
| IOA | inner optic anlage; International Osteopathic Association |
| ION | ischemic optic neuropathy |
| IOT | intraocular tension; intraocular transfer; ipsilateral optic tectum |