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Posterior capsular opacification comparison between morphology and objective visual function.

Chengzhe Lu1, Shasha Yu1, Hui Song1

  • 1Tianjin Eye Hospital, No.4 Gansu Road, Heping District, Tianjin, 300020, China.

BMC Ophthalmology
|February 6, 2019
PubMed
Summary
This summary is machine-generated.

Posterior capsule opacification (PCO) severity impacts visual function, with pear-type PCO causing more light scattering than fibrosis. Objective scatter index (OSI) and optical quality analysis system values (OVs) quantify this visual impairment.

Keywords:
Objective scatter index (OSI)Objective visual functionOptical quality analysis system values (OVs)PCO morphologySeverity

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Area of Science:

  • Ophthalmology
  • Visual Optics
  • Medical Imaging

Background:

  • Posterior capsule opacification (PCO) is a common complication after cataract surgery.
  • PCO can manifest with varying morphology and severity, potentially affecting visual function.
  • The impact of PCO on intraocular stray light and contrast sensitivity requires further objective assessment.

Purpose of the Study:

  • To compare the influence of PCO morphology and severity on intraocular stray light.
  • To evaluate the effect of PCO on objective visual function across different contrast levels.
  • To correlate PCO characteristics with objective measures of visual performance.

Main Methods:

  • Prospective study of 45 patients with PCO.
  • Objective visual function assessed using Optical Quality Analysis System II (OQAS II) for objective scatter index (OSI) and optical quality analysis system values (OVs) at 100%, 20%, and 9% contrast.
  • PCO morphology and severity evaluated using RTVue-100 OCT.

Main Results:

  • Increased OSI correlated with decreased visual acuity in PCO patients.
  • OSI showed a significant correlation with PCO area (r=0.43, p=0.02).
  • Pear type PCO exhibited significantly higher OSI compared to fibrosis PCO (p≤0.001).
  • In pear type PCO, OSI correlated with 100% and 20% OVs, but not 9% OVs.
  • In fibrosis PCO, OSI correlated with 100% and 20% OVs pre-YAG laser treatment.

Conclusions:

  • Objective scatter index (OSI) and optical quality analysis system values (OVs) objectively indicate visual function impairment in PCO.
  • PCO's effects on light scattering and visual function are influenced by its morphology and severity.
  • Different PCO types may have distinct impacts on visual quality and light scatter.