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Visual acuity before proton beam radiotherapy of iris melanoma and at the latest known status. Each circle represents one case, and each line passing through this circle indicates an additional case. A = amblyopia; B = bullous keratopathy; C = cataract; G = glaucoma; H = hyphema; R = recurrence. (From Damato et al. Proton beam radiotherapy of iris melanoma, International Journal of Radiation Oncology Biology Physics, Volume 63, Issue 1, 1 September 2005, Pages 109–115).
