title: Elevation of laser flare photometry in patients with cytomegalovirus retinitis and AIDS.
abstract: OBJECTIVE
  To investigate an alteration of the blood-ocular barriers by laser flare photometry in patients with acquired immunodeficiency syndrome (AIDS) diagnosed with cytomegalovirus retinitis.
  
  
  METHODS
  Serial laser flare photometry measurements from 31 eyes of 31 patients with AIDS and newly diagnosed cytomegalovirus retinitis were compared with measurements from 31 control patients with AIDS but without documented eye disease. Location and extent of retinitis, presence of visual symptoms, and CD4 lymphocyte counts were also compared with laser flare photometry readings.
  
  
  RESULTS
  Laser flare readings (mean +/- SE) were significantly higher in eyes with (13.0 +/- 1.5 photon counts per msec) than without cytomegalovirus retinitis (4.9 +/- 0.3 photon counts per msec) (P < .001). Lesions within the arcade vessels resulted in significantly higher laser flare photometry readings (17.3 +/- 2.5 photon counts per msec) compared with peripheral retinitis (9.8 +/- 1.5 photon counts per msec) (P = .01). A significant correlation was found between area of involvement of peripheral retinitis and laser flare photometry readings (P = .008). Readings in patients without cytomegalovirus retinitis increased significantly 10 months after the first measurement (9.5 +/- 1.9 photon counts per msec) (P = .04). Readings in patients with cytomegalovirus remained elevated 3 months after successful treatment of retinitis (12.3 +/- 2.3 photon counts per msec) (P = .6).
  
  
  CONCLUSIONS
  Laser flare photometry readings are significantly elevated in eyes with cytomegalovirus retinitis, suggesting a breakdown of the blood-ocular barriers. Increasing laser flare photometry readings over time in patients without known ocular disease suggests that HIV infection may cause progressive breakdown of the blood-ocular barrier.
authors.affiliation: Clinical Branch, National Eye Institute, National Institutes of Health, Bethesda, Maryland, USA.
authors.forename: M T
authors.initials: MT
authors.lastname: Magone
authors.forename: R B
authors.initials: RB
authors.lastname: Nussenblatt
authors.forename: S M
authors.initials: SM
authors.lastname: Whitcup
mesh_terms: D000163:Acquired Immunodeficiency Syndrome / Q000150:complications*; D000328:Adult; D018916:Blood-Aqueous Barrier; D018791:CD4 Lymphocyte Count; D003586:Cytomegalovirus Infections / Q000150:complications*; D005136:Eye Proteins / Q000378:metabolism; D005260:Female; D006801:Humans; D007834:Lasers; D008297:Male; D010783:Photometry; D012173:Retinitis / Q000378:metabolism* / Q000473:pathology / Q000821:virology*; D013997:Time Factors; D014786:Vision Disorders / Q000209:etiology
chemical_list: D005136:Eye Proteins