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Orthoptic status before and immediately after heroin detoxification.
A Y Firth1, S Pulling, M P Carr
1Academic Unit of Ophthalmology and Orthoptics, O Floor, Royal Hallamshire Hospital, Glossop Road, Sheffield S10 2JF, UK. a.firth@sheffield.ac.uk
The British Journal of Ophthalmology
|August 20, 2004
Summary
Opiate detoxification can alter eye alignment, causing a shift towards esotropia (inward turning). This change in orthoptic status may contribute to vision problems during withdrawal from heroin and methadone.
Area of Science:
- Ophthalmology
- Neuroscience
- Addiction Medicine
Background:
- Opioid withdrawal can precipitate various physiological changes.
- Orthoptic status, encompassing eye alignment and binocular vision, may be affected.
Purpose of the Study:
- To investigate alterations in orthoptic status during opioid detoxification.
- To assess changes in eye alignment and binocular vision during heroin and methadone withdrawal.
Main Methods:
- Prospective study with a repeated measures design.
- Involved patients undergoing a 5-day naltrexone-assisted opioid detoxification program.
- Orthoptic assessments conducted before and after detoxification.
Main Results:
- A significant shift towards esotropia (inward eye deviation) at distance was observed post-detoxification (p<0.001).
- Reduced stereoacuity, visual acuity, and convergence were noted immediately after detoxification.
- Minor decreases in objective accommodation were found at near distances.
Conclusions:
- The observed esotropic trend during opioid detoxification may predispose individuals to acute concomitant esotropia.
- The underlying mechanism does not appear to involve divergence insufficiency or sixth nerve palsy.
- Orthoptic monitoring is crucial during opioid withdrawal management.