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Related Experiment Videos

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
PubMed
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.

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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:

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  • 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.