Illustrative case of LHON patient with residual central island of vision. (a) Visual field result of both eyes (right eye on the right and left eye on the left) obtained with semiautomated kinetic perimetry and V4e stimulus moved with the speed of 5 degrees per second in patient with LHON. Visual acuity was counting fingers to one meter in both eyes. Central residual visual field measured in square degrees (deg2). Static automated perimetry was not obtained due to poor visual acuity. (b) Fundus pictures (right eye on the left and left eye on the right) of patient number 10 showing swelling of the retinal nerve fibers involving the superior and inferior arcades around the optic disk.