Related Experiment Videos
Optic disc topography and short-term increase in intraocular pressure
J B Jonas1, O Gareis, G O Naumann
1Universitäts-Augenklinik, Universität-Erlangen-Nürnberg, Federal Republic of Germany.
Summary
A short-term rise in intraocular pressure (IOP) does not significantly alter optic disc topography. Retinal vessel diameter changes were observed but did not affect optic nerve head structure.
Area of Science:
- Ophthalmology
- Optometry
- Medical Imaging
Background:
- Intraocular pressure (IOP) is a dynamic variable influenced by various factors.
- Understanding IOP's effect on optic nerve head topography is crucial for diagnosing and managing glaucoma.
Purpose of the Study:
- To investigate the impact of acute intraocular pressure elevations on the two-dimensional topography of the optic nerve head.
- To determine if short-term IOP changes affect key optic disc parameters.
Main Methods:
- Optic disc photography was performed on 63 glaucomatous and 39 normal eyes.
- Photographs were taken at baseline and at 1 and 8 seconds after IOP increases of 10 and 20 mm Hg.
- Measurements included optic disc size, cup, neuroretinal rim, and peripapillary structures.
Main Results:
- No significant changes were detected in the size or form of the optic disc, optic cup, neuroretinal rim, peripapillary scleral ring, or parapapillary chorioretinal atrophy.
- Retinal vessels showed a transient decrease and subsequent re-increase in diameter, significant at a 20 mm Hg pressure elevation (P < 0.05).
Conclusions:
- Short-term elevations in intraocular pressure do not induce significant changes in the two-dimensional optic disc topography.
- While retinal vessels respond to acute IOP changes, the optic nerve head's structural topography remains stable.