Figure 3: Ocular neostigmine test in 6 patients with myasthenia gravis (MG). (A, C, E, G, I, K) baseline ptosis in Patients 1-6, respectively. (B, D, F, H, J, L) Observable increase of the palpebral fissure 30 minutes after instillation of neostigmine drops. The response was striking in Patients 1, 2 and 5 (respectively, B, D and J) who had not received treatment for MG.