title: Comparison of photoreceptor outer segment length in diabetic and idiopathic epiretinal membranes.
abstract: OBJECTIVE
  Idiopathic and diabetic epiretinal membranes (ERMs) differ significantly in terms of macular morphology. Our aim was to compare the photoreceptor outer segment (PROS) length in diabetic and idiopathic ERMs before and after surgery.
  
  
  METHODS
  Fifty-two eyes of 50 patients who underwent pars plana vitrectomy (PPV) due to idiopathic and diabetic ERMs were included in this retrospective case series. All of the patients underwent ERM and internal limiting membrane (ILM) removal. The patients had been followed up 6 months postoperatively. Spectral-domain optical coherence tomography (OCT) was used to measure the PROS length, overall PR length and central foveal thickness (CFT).
  
  
  RESULTS
  The PROS length, overall PR length, and CFT were statistically significantly lower at all the postoperative visits when compared to preoperative values in both the idiopathic and diabetic ERM groups (P<0.001). The amount of decrease in PROS and overall PR length were similar in both groups after surgery (P>0.05). There was no relation between amount of PROS length change and visual acuity gain in both groups (P>0.05).
  
  
  CONCLUSIONS
  Postoperative change of PROS length was similar in idiopathic and diabetic ERMs. PROS length change may not be an indicator of postoperative visual acuity.
authors.affiliation: Ophthalmology Department, Beyoglu Eye Training and Research Hospital, Eye Clinic, Istanbul, Turkey.
authors.forename: K
authors.initials: K
authors.lastname: Yüksel
authors.affiliation: Besni State Hospital, Eye Clinic, Adıyaman, Turkey.
authors.forename: Y
authors.initials: Y
authors.lastname: Karaküçük
authors.affiliation: Ophthalmology Department, Beyoglu Eye Training and Research Hospital, Eye Clinic, Istanbul, Turkey.
authors.forename: A
authors.initials: A
authors.lastname: Özkaya
authors.affiliation: Ophthalmology Department, Pamukkale University, Denizli, Turkey.
authors.forename: G
authors.initials: G
authors.lastname: Pekel
authors.affiliation: Ophthalmology Department, Beyoglu Eye Training and Research Hospital, Eye Clinic, Istanbul, Turkey.
authors.forename: Ö
authors.initials: Ö
authors.lastname: Baz
authors.affiliation: Ophthalmology Department, Beyoglu Eye Training and Research Hospital, Eye Clinic, Istanbul, Turkey.
authors.forename: C
authors.initials: C
authors.lastname: Alagöz
authors.affiliation: Ophthalmology Department, Beyoglu Eye Training and Research Hospital, Eye Clinic, Istanbul, Turkey.
authors.forename: A T
authors.initials: AT
authors.lastname: Yazıcı
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D003930:Diabetic Retinopathy / Q000175:diagnosis* / Q000503:physiopathology / Q000601:surgery; D019773:Epiretinal Membrane / Q000175:diagnosis* / Q000503:physiopathology / Q000601:surgery; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D055214:Retinal Photoreceptor Cell Outer Segment / Q000473:pathology*; D012189:Retrospective Studies; D041623:Tomography, Optical Coherence; D014792:Visual Acuity / Q000502:physiology; D014821:Vitrectomy