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Table 4 Pre- and postoperative visual acuity and astigmatism

From: Manual mid-stromal dissection as a low risk procedure to stabilize mild to moderate progressive keratoconus

Case no.

Max FU in years (m)

BSCVA Snellen (Decimal)

BCLVA Snellen (Decimal)

Cylinder in D

SE in D

Cylinder in D

SE in D

Pre-op

Latest FU

Pre-op

Latest FU

Pre-op

Latest FU

Pre-op

Latest FU

1

9.4 (113)

20/60 (0.3)

20/40 (0.5)

n.a.

20/40 (0.5)

−5.50

− 2.50

−6.00

−4.25

2

3.1 (37)

20/20 (1.0)

20/16 (1.2)

n.a.

n.a.

−5.00

2.50

−5.50

2.50

3

3.0 (36)

20/20 (1.0)

20/16 (1.2)

n.a.

n.a.

−5.00

2.50

−5.50

2.75

4

9.2 (110)

20/25 (0.8)

20/25 (0.8)

20/25 (0.8)

n.a.

−3.25

−7.13

−6.50

−7.50

5

3.9 (47)

20/50 (0.4)

n.a.

20/22 (0.9)

20/50 (0.4)

0.00

0.00

n.a.

n.a.

6

8.7 (104)

20/33 (0.6)

20/20 (1.0)

n.a.

20/16 (1.2)

−4.00

−0.50

−4.00

−1.25

7

8.8 (106)

20/25 (0.8)

20/25 (0.8)

n.a.

n.a.

−4.00

−2.00

−3.50

−1.50

8

7.3 (87)

20/50 (0.4)

20/28 (0.7)

20/33 (0.6)

20/25 (0.8)

−6.00

−7.00

−5.00

−2.00

9

6.8 (82)

20/28 (0.7)

20/20 (1.0)

20/25 (0.8)

20/20 (1.0)

−1.00

−5.75

−2.75

−8.50

10

8.5 (102)

n.a.

20/80 (0.25)

20/28 (0.7)

20/50 (0.4)

n.a.

n.a.

0.00

−4.00

11

7.3 (87)

n.a.

20/28 (0.7)

n.a.

20/20 (1.0)

−7.50

0.50

−6.00

0.50

12

8.1 (97)

20/20 (1.0)

20/16 (1.2)

n.a.

20/16 (1.2)

−0.50

−2.25

n.a.

n.a.

13

7.7 (92)

20/22 (0.9)

20/20 (1.0)

n.a.

20/20 (1.0)

−3.00

0.25

−3.25

−0.38

14

1.6 (19)

n.a.

n.a.

20/25 (0.8)

20/100 (0.2)

n.a.

n.a.

n.a.

n.a.

15

6.9 (83)

20/100 (0.2)

20/133 (0.15)

20/40 (0.5)

20/33 (0.6)

−6.00

−10.00

−4.25

−9.13

16

5.8 (70)

20/50 (0.4)

20/33 (0.6)

20/28 (0.7)

20/20 (1.0)

−0.50

−0.25.

−3.75

0.13

  1. Max = Maximum; FU = follow-up; m = months; BSCVA = best spectacle corrected visual acuity; BCLVA = best contact lens corrected visual acuity; D = diopters; SE = spherical equivalent; Pre-op = preoperative; n.a. = not available