title: Comparing glaucoma progression on 24-2 and 10-2 visual field examinations.
abstract: OBJECTIVE
  To compare the rate of mean deviation (MD) change on 24-2 versus 10-2 VFs in treated glaucomatous eyes with 5 or more examinations.
  
  
  METHODS
  In a retrospective study, 24-2 and 10-2 VFs of 131 glaucoma patients (167 eyes) who had undergone at least 5 VFs examinations during their follow-up were analyzed. All these patients had VF defects both on 24-2 and 10-2 VFs. Rates of MD change were calculated using best linear unbiased predictions (BLUP).
  
  
  RESULTS
  Median age, MD on 24-2 VF at baseline, number of VFs performed during follow-up and follow-up duration were 55 years, -16.9 dB, 9 and 9 years respectively. Median rate of MD change was significantly greater (p<0.001) on 10-2 VF (-0.26 dB/year; interquartile range [IQR]: -0.47, -0.11) compared to 24-2 VFs (-0.19 dB/year; IQR: -0.41, -0.03). Comparing the rates of MD change in eyes with different severities of VF loss (early [MD better than -6 dB], moderate [-6 dB to -12 dB], advanced [-12 to -20 dB] and severe [MD worse than -20 dB]) at baseline (based on the MD on 24-2 VF), median rate of MD change was comparable between 10-2 and 24-2 VFs in mild (-0.45 dB/year vs. -0.40 dB/year, P = 0.42) and moderate (-0.32 dB/year vs. -0.40 dB/year, P = 0.26) VF loss categories, while the same were significantly greater on 10-2 VFs in advanced (-0.28 dB/year vs. -0.21 dB/year, P = 0.04) and severe (-0.18 dB/year vs. -0.06 dB/year, P<0.001) VF loss categories.
  
  
  CONCLUSIONS
  In patients with VF defects both on 24-2 and 10-2 VFs, evaluating the rate of MD change on 10-2 VFs may help in better estimation of glaucoma progression, especially so in eyes with advanced glaucoma at baseline.
authors.affiliation: VST Glaucoma Center, L V Prasad Eye Institute, Hyderabad, India.
authors.forename: Harsha L
authors.initials: HL
authors.lastname: Rao
authors.affiliation: VST Glaucoma Center, L V Prasad Eye Institute, Hyderabad, India.
authors.forename: Viquar U
authors.initials: VU
authors.lastname: Begum
authors.affiliation: VST Glaucoma Center, L V Prasad Eye Institute, Hyderabad, India.
authors.forename: Deepa
authors.initials: D
authors.lastname: Khadka
authors.affiliation: VST Glaucoma Center, L V Prasad Eye Institute, Hyderabad, India.
authors.forename: Anil K
authors.initials: AK
authors.lastname: Mandal
authors.affiliation: VST Glaucoma Center, L V Prasad Eye Institute, Hyderabad, India.
authors.forename: Sirisha
authors.initials: S
authors.lastname: Senthil
authors.affiliation: VST Glaucoma Center, L V Prasad Eye Institute, Hyderabad, India.
authors.forename: Chandra S
authors.initials: CS
authors.lastname: Garudadri
mesh_terms: D000368:Aged; D018450:Disease Progression; D005901:Glaucoma / Q000503:physiopathology*; D006801:Humans; D007429:Intraocular Pressure / Q000502:physiology; D008875:Middle Aged; D010808:Physical Examination / Q000379:methods; D012189:Retrospective Studies; D014786:Vision Disorders / Q000503:physiopathology; D058609:Visual Field Tests / Q000379:methods; D014794:Visual Fields / Q000502:physiology*