Irish Child Health Database - Peer Reviewed Papers
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Ocular axial length in homocystinuria patients with and without ocular changes: effects of early treatment and biochemical control
Published in:
J Aapos, Vol: 8, Page: 254-8
Publication Date:
June 2004
Aims & Objectives:
The aim of this study was to examine whether myopia in homocystinuria could be due to increased ocular axial length
Abstract:
PURPOSE: To establish whether myopia in homocystinuria could be due to increased ocular axial length. METHODS: Measurement of ocular axial length by A-scan ultrasound in eyes of homocystinuria patients. RESULTS: Patients were divided into three groups. Group I, with no ocular pathology (28 eyes), had mean refractive error of -0.25 D (spherical equivalent) and mean axial length of 23.4 mm +/- 0.9 (+/-1 standard deviation) mm. Group II, with phacodonesis or lens subluxation (12 eyes), had mean refractive error of -10.7 D and mean axial length of 23.8 mm +/-1.9 mm. Patients with phacodonesis had simple myopia whereas those with lens subluxation had marked myopic astigmatism. Group III included patients with complete lens dislocation in at least one eye (12 eyes) and were optically aphakic with a mean refractive error of +12.9 D and mean axial length of 24.9 mm +/- 0.9 mm. All Group I patients had good long-term metabolic control while those in Groups II and III did not. Group III eyes had significantly longer mean axial length than Group I (P =.0018) or normal eyes (P =.0163). There was no statistical difference in mean axial length between Group I and normal eyes. CONCLUSIONS: Ocular axial length is significantly increased in individuals with homocystinuria and lens dislocation. Increased axial length is a complication that has not been previously described in homocystinuria and may be preventable with early treatment and good biochemical control.
Authors:
Study Type:
Study Papers » Case Study » Descriptive Studies - Without a comparision
Categories:
myopia; homocystinuria
International Classification:
Diseases of the eye and adnex - Disorders of ocular muscles, binocular movement, accommodation and refraction - myopia
Keywords:
- Adolescent
- Adult
- Astigmatism/ etiology/physiopathology
- Body Weights and Measures
- Child
- Cystathionine beta-Synthase/deficiency
- Diet, Protein-Restricted
- Eye/growth & development/ pathology
- Female
- Homocystine/blood
- Homocystinuria/ complications/physiopathology/ therapy
- Humans
- Lens Subluxation/etiology/therapy
- Male
- Myopia/ etiology/physiopathology
- Pyridoxine/ therapeutic use
- Visual Acuity
Geography:
Republic of Ireland (Dublin (USA))



