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Related Concept Videos

Residuals and Least-Squares Property01:11

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The vertical distance between the actual value of y and the estimated value of y. In other words, it measures the vertical distance between the actual data point and the predicted point on the line
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Related Experiment Video

Updated: Aug 8, 2025

Assessing Binocular Central Visual Field and Binocular Eye Movements in a Dichoptic Viewing Condition
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To compare central visual field progression using mean deviation and pointwise linear regression analysis.

Trupti S Patil1, N Viswanathan1, Ronnie George1

  • 1Smt. Jadhavbai Nathamal Singhvee Glaucoma Services, Sankara Nethralaya Medical Research Foundation, Chennai, Tamil Nadu, India.

Indian Journal of Ophthalmology
|March 6, 2023
PubMed
Summary
This summary is machine-generated.

Pointwise linear regression (PLR) analysis effectively detects central visual field progression in advanced glaucoma. This method is more sensitive than mean deviation for identifying changes in patients with significant glaucomatous damage.

Keywords:
10-2 PLRadvanced glaucomacentral visual field progression

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Area of Science:

  • Ophthalmology
  • Visual Neuroscience

Background:

  • Glaucoma is a leading cause of irreversible blindness worldwide.
  • Monitoring visual field progression is crucial for managing glaucoma and preventing vision loss.
  • Advanced glaucoma often presents complex patterns of visual field defects.

Purpose of the Study:

  • To compare the efficacy of mean deviation (MD) and pointwise linear regression (PLR) analysis in detecting central visual field progression in glaucoma patients.
  • To evaluate the utility of PLR analysis for identifying subtle changes in advanced glaucomatous damage.

Main Methods:

  • Analysis of 10-2 Humphrey visual field (HVF) tests from 74 patients with moderate to advanced primary glaucoma.
  • Inclusion criteria: minimum of five reliable 10-2 HVF tests, at least two years of follow-up, and best-corrected visual acuity better than 6/12.
  • Progression defined by a regression slope less than -1 dB/year at P < 0.01 for individual threshold points using PLR analysis.

Main Results:

  • Twenty-eight percent of eyes (27/96) showed progression. Twelve percent (12/96) exhibited progression in two or more points within the same hemifield via PLR analysis.
  • Eyes identified as progressing by PLR analysis showed a significantly greater median rate of mean deviation (MD) change (-0.5 dB/year) compared to non-progressing eyes (-0.06 dB/year).
  • Progression was detected in only one patient using the 24-2 HVF test, highlighting the sensitivity of 10-2 HVF with PLR analysis.

Conclusions:

  • Pointwise linear regression (PLR) analysis is a valuable tool for detecting central visual field progression, particularly in eyes with advanced glaucomatous damage.
  • PLR analysis demonstrates superior sensitivity in identifying subtle visual field changes compared to standard mean deviation metrics in this population.