Karl Ernst Theodor Schweigger, Handbook of Ophthalmology (1878)
“ Differential diagnosis from paralysis of rectus inferior 145—147 Spasm of Ocular Muscles 148 Strabismus. Distinction between paralytic and typical or concomitant squint 149 Strabismus Convergens. Its connection with hypermetropia, amblyopia, and loss of accommodation. Elasticity of muscles. Reflex impulses. Stationary monolateral squint. Invariability of squinting angle upon change of fixation, and exceptions to the rule. Alternating strabismus convergens. Periodic squint. Linear measure of squint. Simultaneous upward or downward squint. Binocular vision with strabismus. ”
