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Randomized Controlled Trial
. 2016 Jun;123(6):1173-80.
doi: 10.1016/j.ophtha.2016.01.039. Epub 2016 Mar 2.

Structural and Functional Progression in the Early Manifest Glaucoma Trial

Affiliations
Randomized Controlled Trial

Structural and Functional Progression in the Early Manifest Glaucoma Trial

HannaMaria Öhnell et al. Ophthalmology. 2016 Jun.

Abstract

Purpose: To elucidate the temporal relationship between detection of glaucomatous optic disc progression, as assessed by fundus photography, and visual field progression.

Design: Prospective, randomized, longitudinal trial.

Participants: Three hundred six study eyes with manifest glaucoma with field loss and 192 fellow eyes without any field defect at the start of the trial, from a total of 249 subjects included in the Early Manifest Glaucoma Trial (EMGT), were assessed.

Methods: Evaluation of visual field progression and optic disc progression during an 8-year follow-up period. Three graders independently assessed optic disc progression in optic disc photographs. Visual field progression was assessed using glaucoma change probability maps and the EMGT progression criterion.

Main outcome measures: Time to detection of visual field progression and optic disc progression.

Results: Among study eyes with manifest glaucoma, progression was detected in the visual field first in 163 eyes (52%) and in the optic disc first in 39 eyes (12%); in 1 eye (0%), it was found simultaneously with both methods. Among fellow eyes with normal fields, progression was detected in the visual field first in 28 eyes (15%) and in the optic disc first in 34 eyes (18%); in 1 eye (1%), it occurred simultaneously.

Conclusions: In eyes with manifest glaucoma, progression in the visual field was detected first more than 4 times as often as progression in the optic disc. Among fellow eyes without visual field loss at baseline, progression was detected first as frequently in the optic disc as in the visual field.

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Figures

Fig. 2
Fig. 2
Study eyes: Cumulative incidence for visual field and optic disc progression to be detected first for the 306 study eyes, that all had manifest glaucoma with visual field loss. Visual field progression was considerably more common to be detected first. Death occurring within 6 months from the last visit where any progression had not been detected is shown as competing risk. The row below the x-axis denotes the number of eyes still at risk.
Fig. 3
Fig. 3
Fellow eyes: Cumulative incidence for visual field and optic disc progression to be detected first for 192 fellow eyes with no visual field defects at baseline. Visual field and optic disc progression occurred first with similar frequencies. There was no statistically significant difference. Death occurring within 6 months from the last visit where any progression had not been detected is shown as competing risk. The row below the x-axis denotes the number of eyes still at risk.
Figure 4
Figure 4
Graphs showing (A) apparently normal fellow eyes, (B) fellow eyes with ocular hypertension, and (C) preperimetric fellow eyes. Cumulative incidence for visual field and optic disc progression to be detected first (A) for 116 fellow eyes without disc changes or raised intraocular pressure, (B) for 39 ocular hypertensive fellow eyes, and (C) for 37 fellow eyes with preperimetric glaucoma. Fewer progressions were seen in (A) apparently normal fellow eyes without raised intraocular pressure or optic disc changes than in eyes with optic disc signs or elevated intraocular pressure. There was no statistically significant difference for the cumulative incidence between the 2 methods for any of the 3 subgroups. Death occurring within 6 months from the last visit where any progression had not been detected is shown as competing risk. The row below the x-axis in each figure denotes the number of eyes still at risk.
Figure 4
Figure 4
Graphs showing (A) apparently normal fellow eyes, (B) fellow eyes with ocular hypertension, and (C) preperimetric fellow eyes. Cumulative incidence for visual field and optic disc progression to be detected first (A) for 116 fellow eyes without disc changes or raised intraocular pressure, (B) for 39 ocular hypertensive fellow eyes, and (C) for 37 fellow eyes with preperimetric glaucoma. Fewer progressions were seen in (A) apparently normal fellow eyes without raised intraocular pressure or optic disc changes than in eyes with optic disc signs or elevated intraocular pressure. There was no statistically significant difference for the cumulative incidence between the 2 methods for any of the 3 subgroups. Death occurring within 6 months from the last visit where any progression had not been detected is shown as competing risk. The row below the x-axis in each figure denotes the number of eyes still at risk.
Figure 4
Figure 4
Graphs showing (A) apparently normal fellow eyes, (B) fellow eyes with ocular hypertension, and (C) preperimetric fellow eyes. Cumulative incidence for visual field and optic disc progression to be detected first (A) for 116 fellow eyes without disc changes or raised intraocular pressure, (B) for 39 ocular hypertensive fellow eyes, and (C) for 37 fellow eyes with preperimetric glaucoma. Fewer progressions were seen in (A) apparently normal fellow eyes without raised intraocular pressure or optic disc changes than in eyes with optic disc signs or elevated intraocular pressure. There was no statistically significant difference for the cumulative incidence between the 2 methods for any of the 3 subgroups. Death occurring within 6 months from the last visit where any progression had not been detected is shown as competing risk. The row below the x-axis in each figure denotes the number of eyes still at risk.

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References

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