26. Simpson ER. Ciliary body melanoma: a special challenge.Can J Ophthalmol 2004;39(4):365–371.

27. Horgan N, Shields CL, Swanson L, et al. Altered chromo-some expression of uveal melanoma in the setting of melano-cytosis. Acta Ophthalmol 2009;87(5):578–580.

28. Ishikawa H, Liebmann JM, Ritch R. Quantitative assessmentof the anterior segment using ultrasound biomicroscopy. CurrOpin Ophthalmol 2000;11(2):133–139.

REPORTING VISU

The AJO encourages authors to report the visual acuity in thegathering the data provided they were recorded in one of the mprovided to the readers as an aid to interpret visual acuity find

Table of Equivalent Visual

Snellen Visual Acuities

4 Meters 6 Meters 20 Feet

4/40 6/60 20/200

4/32 6/48 20/160

4/25 6/38 20/125

4/20 6/30 20/100

4/16 6/24 20/80

4/12.6 6/20 20/63

4/10 6/15 20/50

4/8 6/12 20/40

4/6.3 6/10 20/32

4/5 6/7.5 20/25

4/4 6/6 20/20

4/3.2 6/5 20/16

4/2.5 6/3.75 20/12.5

4/2 6/3 20/10

From Ferris FL III, Kassoff A, Bresnick GH, Bailey I. New visual acuity cha

VOL. 155, NO. 4 ULTRASOUND BIOMICROSCOPY IN OCUL

29. Tello C, Liebmann J, Potash SD, Cohen H, Ritch R.Measurement of ultrasound biomicroscopy images: intraob-server and interobserver reliability. Invest Ophthalmol Vis Sci

1994;35(9):3549–3552.30. Souza Filho EC, Marigo Fde A, Oliveira C, Cronemberger S,

Calixto N. Intraobserver reproducibility in anterior segmentmorphometry of normal eyes using ultrasound biomicroscopy(UBM). Arq Bras Oftalmol 2005;68(2):177–183.

AL ACUITIES

manuscript using the same nomenclature that was used inethods listed here. This table of equivalent visual acuities isings in familiar units.

Acuity Measurements

Decimal Fraction LogMAR

0.10 þ1.0

0.125 þ0.9

0.16 þ0.8

0.20 þ0.7

0.25 þ0.6

0.32 þ0.5

0.40 þ0.4

0.50 þ0.3

0.63 þ0.2

0.80 þ0.1

1.00 0.0

1.25 �0.1

1.60 �0.2

2.00 �0.3

rts for clinical research. Am J Ophthalmol 1982;94:91–96.

687AR/OCULODERMAL MELANOCYTOSIS