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Peripapillary RNFL Thickness Changes after Panretinal Photocoagulation.

Shahin Yazdani1, Poorya Samadi, Mohammad Pakravan

  • 1*MD Ocular Tissue Engineering Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran (SY); and Ophthalmic Research Center, Labbafinejad Medical Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran (SY, PS, MP, HE, EG, RN).

Optometry and Vision Science : Official Publication of the American Academy of Optometry
|May 28, 2016
PubMed
Summary
This summary is machine-generated.

Panretinal photocoagulation (PRP) for diabetic retinopathy initially increases retinal nerve fiber layer (RNFL) thickness, but thinning occurs by six months. OCT measurements of RNFL changes post-PRP require careful interpretation.

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Area of Science:

  • Ophthalmology
  • Diabetic Retinopathy Research
  • Optical Coherence Tomography

Background:

  • Diabetic retinopathy (DR) is a leading cause of vision loss.
  • Panretinal photocoagulation (PRP) is a standard treatment for proliferative diabetic retinopathy (PDR).
  • Spectral domain optical coherence tomography (SD-OCT) is crucial for assessing retinal structures.

Purpose of the Study:

  • To evaluate changes in peripapillary retinal nerve fiber layer (RNFL) thickness after PRP in patients with PDR.
  • To assess the impact of PRP on RNFL thickness using SD-OCT.

Main Methods:

  • Interventional case series involving 42 eyes of 42 diabetic patients.
  • RNFL thickness measured by SD-OCT at baseline and at 1, 3, and 6 months post-PRP.

Main Results:

  • Mean global RNFL thickness increased by 3 μm at 1 month (p=0.04) and decreased by 2.4 μm at 6 months (p=0.054) post-PRP.
  • RNFL thickness increased in all quadrants at 1 month (temporal significant), and thinned in all quadrants at 6 months (superior significant).
  • Visual acuity showed a non-significant improvement of 0.02 logMAR after 6 months.

Conclusions:

  • RNFL thickness measured by SD-OCT shows an initial increase shortly after PRP, followed by a decrease at 6 months.
  • Changes in RNFL thickness following PRP in diabetic eyes warrant cautious interpretation.
  • Understanding these dynamic changes is vital for monitoring PDR treatment efficacy.