Skip to main content

Table 1 Definition of glaucomatous visual field defects for level 1 evidence of glaucoma

From: A Population-based survey of the prevalence and types of glaucoma in Nigeria: results from the Nigeria National Blindness and Visual Impairment Survey

FDT test defects

Visual fields

 

Normal

Definitely glaucoma

Probably glaucoma

Possibly glaucoma

Unlikely glaucomaa

P <5 %

2 or less non-adjacent

4

3

2 adjacent

 

P <2 %

1

3

2

1

 

P <1 %

0

2

1 non-edge

  

P <0.5 %

0

1

1 non-edge

  

Comments

 

At any location in any hemi-field

At one hemi-field

At one hemi-field

If TDP plot is better than PDP plot

Participants with glaucoma

Total

    

 Number of participantsb

268 (100 %)

252 (94 %)

6 (2.2 %)

9 (3.4 %)

1 (0.4 %)

 Number of eyes

310 (100 %)

283 (91.3 %)

9 (2.9 %)

13 (4.2 %)

5 (1.6 %)

  1. TDP total deviation probability, PDP pattern deviation probability
  2. aOther evidence of glaucoma noted in those classified as glaucoma
  3. bIn participants with bilateral glaucoma, the eye with the highest level of evidence is used to classify that person