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Br J Ophthalmol 85:1057-1060 doi:10.1136/bjo.85.9.1057
  • Scientific correspondence

Anomalies of binocular function in patients with longstanding asymmetric keratoconus

Table 3

Details of orthoptic findings

Patient Prism cover test with scleral lens Prism fusion range with scleral lens 4 Dioptre base-out prism Previous ophthalmic history
6 metres (prism dioptres) 1/3 metre (prism dioptres) 6 metres (prism dioptres) 1/3 metre (prism dioptres)
1 1XT 1R/L 4XT 1R/L 10 PBO–4 PBI 40 PBO–4 PBI Not overcome Patched
2 4XT 16XT 4 PBO–6 PBI 16 PBO–14 PBI Not overcome None
3 12XT 8XT NIL NIL Not overcome None
4 2XT 8XT 12 PBO–2 PBI 25 PBO–8 PBI Not overcome None
5 16XT 2L/R 16XT 2L/R 6 PBO–2 PBI 6 PBO–2 PBI Not overcome None
6 1XT 1L/R 4XT 1L/R NIL 18 PBO–8 PBI Not overcome PK
7 4XT 2R/L 10XT 6 PBO–1 PBI 6 PBO–1 PBI Not overcome None
8 4XT 2R/L 6XT 16 PBO–6 PBI 35 PBO–10 PBI Not overcome None
9 2XT 2L/R 8XT 2L/R 10 PBO–8 PBI 20 PBO–16 PBI Not overcome PK
10 1XT 4XT 16 PBO–8 PBI 35 PBO–10 PBI Not overcome None
11 2ET 1R/L 4XT 1R/L 20 PBO–2 PBI 45 PBO–16 PBI Not overcome None
12 6XT 16XT NIL NIL Not binocular None
13 1ET 2L/R 2XT 3L/R 16 PBO–4 PBI 30 PBO–14 PBI Not overcome None
14 1XT 1XT 20 PBO–8 PBI 40 PBO–16 PBI Not overcome None
15 0 4R/L 6XT 2R/L 16 PBO–6 PBI 30 PBO–14 PBI Not overcome None
16 6XT 4XT NIL NIL Not binocular None
17 2XT 1R/L 8XT 2R/L 6 PBO–6 PBI 25 PBO–14 PBI Not overcome None
18 20XT 6R/L 4XT 2R/L 20 PBO–10 PBI 20 PBO–12 PBI Not overcome None
19 0 1L/R 6XT 2L/R 12 PBO–4 PBI 30 PBO–10 PBI Not overcome None
20 1XT 10XT 2 PBO–4 PBI 4 PBO–4 PBI Not overcome None

  • XT = exodeviation; ET = esodeviation; PBO = prism base out; PBI = prism base in; PK = penetrating keratoplasty to fellow eye; R/L = right over left; L/R = left over right.

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