Reporting Visual Acuities

Reporting Visual Acuities

9. Sato T, Babazono A, Shields JA, Shields CL, De Potter P, Mastrangelo MJ. Time to systemic metastasis in patients with posterior uveal melanoma. Can...

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9. Sato T, Babazono A, Shields JA, Shields CL, De Potter P, Mastrangelo MJ. Time to systemic metastasis in patients with posterior uveal melanoma. Cancer Invest 1997;15(2):98–105. 10. Gragoudas ES, Seddon JM, Egan K, et al. Long-term results of proton beam irradiated uveal melanomas. Ophthalmology 1987;94(4):349–353. 11. Dunavoelgyi R, Dieckmann K, Gleiss A, et al. Local tumor control, visual acuity, and survival after hypofractionated stereotactic photon radiotherapy of choroidal melanoma in 212 patients treated between 1997 and 2007. Int J Radiation Oncol Biol Phys 2011;81(1):199–205.

12. Berglin L, Algvere PV, Seregard S. Photoreceptor decay over time and apoptosis in experimental retinal detachment. Graefes Arch Clin Exp Ophthalmol 1997;235(5):306–312. 13. Augsburger JJ, Shields JA. Cataract surgery following cobalt-60 plaque radiotherapy for posterior uveal malignant melanoma. Ophthalmology 1985;92(6): 815–822. 14. Bach M, Kommerell G. Determining visual acuity using European normal values: scientific principles and possibilities for automatic measurement [in German]. Klin Monbl Augenheilkd 1998;212(4):190–195.

REPORTING VISUAL ACUITIES The AJO encourages authors to report the visual acuity in the manuscript using the same nomenclature that was used in gathering the data provided they were recorded in one of the methods listed here. This table of equivalent visual acuities is provided to the readers as an aid to interpret visual acuity findings in familiar units.

Table of Equivalent Visual Acuity Measurements Snellen Visual Acuities 4 Meters

6 Meters

20 Feet

Decimal Fraction

LogMAR

4/40 4/32 4/25 4/20 4/16 4/12.6 4/10 4/8 4/6.3 4/5 4/4 4/3.2 4/2.5 4/2

6/60 6/48 6/38 6/30 6/24 6/20 6/15 6/12 6/10 6/7.5 6/6 6/5 6/3.75 6/3

20/200 20/160 20/125 20/100 20/80 20/63 20/50 20/40 20/32 20/25 20/20 20/16 20/12.5 20/10

0.10 0.125 0.16 0.20 0.25 0.32 0.40 0.50 0.63 0.80 1.00 1.25 1.60 2.00

þ1.0 þ0.9 þ0.8 þ0.7 þ0.6 þ0.5 þ0.4 þ0.3 þ0.2 þ0.1 0.0 0.1 0.2 0.3

From Ferris FL III, Kassoff A, Bresnick GH, Bailey I. New visual acuity charts for clinical research. Am J Ophthalmol 1982;94:91–96.

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PROTON THERAPY OF UVEAL MELANOMA IN THE INTERMEDIATE FUNDUS

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