Neuropathic ocular pain due to dry eye is associated with multiple comorbid chronic pain syndromes

Anat Galor, Derek Covington, Alexandra E. Levitt, Katherine T. McManus, Benjamin Seiden, Elizabeth R. Felix, Jerry Kalangara, William Feuer, Dennis J. Patin, Eden R. Martin, Konstantinos D. Sarantopoulos, Roy C. Levitt

Research output: Contribution to journalArticlepeer-review

45 Scopus citations

Abstract

Recent data show that dry eye (DE) susceptibility and other chronic pain syndromes (CPS) such as chronic widespread pain, irritable bowel syndrome, and pelvic pain, might share common heritable factors. Previously, we showed that DE patients described more severe symptoms and tended to report features of neuropathic ocular pain (NOP). We hypothesized that patients with a greater number of CPS would have a different DE phenotype compared with those with fewer CPS. We recruited a cohort of 154 DE patients from the Miami Veterans Affairs Hospital and defined high and low CPS groups using cluster analysis. In addition to worse nonocular pain complaints and higher post-traumatic stress disorder and depression scores (P <.01), we found that the high CPS group reported more severe neuropathic type DE symptoms compared with the low CPS group, including worse ocular pain assessed via 3 different pain scales (P <.05), with similar objective corneal DE signs. To our knowledge, this was the first study to show that DE patients who manifest a greater number of comorbid CPS reported more severe DE symptoms and features of NOP. These findings provided further evidence that NOP might represent a central pain disorder, and that shared mechanistic factors might underlie vulnerability to some forms of DE and other comorbid CPS. Perspective DE patients reported more frequent CPS (high CPS group) and reported worse DE symptoms and ocular and nonocular pain scores. The high CPS group reported symptoms of NOP that share causal genetic factors with comorbid CPS. These results imply that an NOP evaluation and treatment should be considered for DE patients.

Original languageEnglish (US)
Pages (from-to)310-318
Number of pages9
JournalJournal of Pain
Volume17
Issue number3
DOIs
StatePublished - Mar 1 2016

Keywords

  • Dry eye symptoms
  • allodynia
  • central pain syndromes
  • chronic overlapping pain syndromes
  • chronic pain
  • comorbid pain syndromes
  • hyperalgesia
  • neuropathic ocular pain
  • neuropathic pain

ASJC Scopus subject areas

  • Neurology
  • Clinical Neurology
  • Anesthesiology and Pain Medicine

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