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Superior segmental optic nerve hypoplasia accompanied by progressive normal-tension glaucoma
Yoshio Yamazaki1, Fukuko Hayamizu
1Department of Ophthalmology, Division of Visual Science, Nihon University School of Medicine, Tokyo, Japan.
Clinical Ophthalmology (Auckland, N.Z.)
|November 3, 2012
Summary
This case report details superior segmental optic hypoplasia (SSOH) combined with normal-tension glaucoma. It highlights progressive visual field defects in the right eye despite controlled intraocular pressure.
Area of Science:
- Ophthalmology
- Neurology
Background:
- Superior segmental optic hypoplasia (SSOH) is a rare congenital condition affecting optic nerve development.
- Normal-tension glaucoma (NTG) is characterized by glaucomatous optic nerve damage and visual field loss with intraocular pressure (IOP) below 21 mmHg.
Observation:
- A 40-year-old male with incidentally diagnosed bilateral SSOH presented with optic disc hemorrhage.
- Progressive retinal nerve fiber layer defects and visual field deterioration were noted in the right eye.
- The left eye maintained stable visual fields, and diurnal intraocular pressure (IOP) variations were monitored.
Findings:
- The right eye exhibited a higher mean IOP compared to the left eye, despite both remaining under 21 mmHg.
- This case represents the first documented instance of SSOH co-occurring with NTG and progressive visual field defects.
- Disc hemorrhage and expanding retinal nerve fiber layer defects correlated with visual field deterioration in the right eye.
Implications:
- This case underscores the importance of comprehensive ophthalmic evaluation in patients with SSOH, including glaucoma screening.
- It suggests a potential association between SSOH and the development or progression of normal-tension glaucoma.
- Further research is warranted to elucidate the underlying mechanisms and long-term prognosis of this combined condition.
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