title: Clinical progress in impending central retinal vein occlusion.
abstract: OBJECTIVE
  Impending central retinal vein occlusion is associated with mild or no loss of vision; however, its progress and vision prognosis have not been clearly defined until now. Therefore, we studied the progress and prognoses in patients with impending central retinal vein occlusion.
  
  
  METHODS
  For this study, we selected ten subjects who had been diagnosed with impending central retinal vein occlusion, and we retrospectively reviewed their progress and prognoses.
  
  
  RESULTS
  The average age of the subjects was 31.0 years (18 to 48 years). Eight patients were male and two were female. The average observational period was 5.5 months. Six out of ten subjects were found to have no underlying systemic disease, four subjects had underlying disease. All ten patients were affected unilaterally. When initially tested, the affected eyes showed an average vision of LogMar 0.30. The final vision test revealed an average of LogMar 0.04, which indicates good progress and prognosis. In one patient, retinal hemorrhage and macular edema progressively worsened after the diagnosis, and the patient was treated with radial optic neurotomy.
  
  
  CONCLUSIONS
  The cases of impending central retinal vein occlusion that we observed seemed to primarily affect young patients with generally good prognoses. However, in some cases, the degrees of obstruction and hemorrhage increased as time progressed. This suggests that impending central retinal vein occlusion could develop into the prodromal phase of an acute attack.
authors.affiliation: Department of Ophthalmology, Wonju Christian Hospital, Yonsei University Wonju College of Medicine, Wonju, Korea.
authors.forename: Dong-Hoon
authors.initials: DH
authors.lastname: Lee
authors.forename: Seok-Joon
authors.initials: SJ
authors.lastname: Lee
authors.forename: Ie-Na
authors.initials: IeN
authors.lastname: Yoon
mesh_terms: D000293:Adolescent; D000328:Adult; D018450:Disease Progression; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D012170:Retinal Vein Occlusion / Q000503:physiopathology*; D012189:Retrospective Studies