[Spasm of the near reflex. Treatment with botulinum toxin]. / Espasmo del reflejo de cerca. Tratamiento con toxina botulínica.

CLINICAL CASE: A 38-year old female with diplopia and esotropia, with limitation of ocular abduction in both eyes, with full abduction after doll's head rotation also being observed. She was diagnosed with spasm of the near reflex. Treatment with injections of botulinum toxin in both medial rectus has temporally resolved the convergence spasm. DISCUSSION: Near reflex spasm is characterized as miosis, pseudomyopia, and convergent strabismus that lead to diplopia, blurred vision, headache, and variable, progressive, and intermittent esotropia. As the spasm worsens there will be limited ocular versions and ductions simulating a sixth nerve palsy. Botulinum toxin may be effective in some cases.

Methods and Effect of Management of Patients with Convergence Spasm and Aquired Pseudomyopia

PURPOSE: To evaluate changes in the degree of pseudomyopia and prognosis in patients with convergence spasm and acquired pseudomyopia. METHODS: The medical records of patients with convergence spasm and acquired pseudomyopia at the Korea University Medical Center from 2011 to 2014 were identified. We reviewed the patients' gender, age, onset time, visual acuity, refractive error, angle of strabismic deviation and the selected management (cycloplegics, patching, cycloplegics + patching, prism glasses). RESULTS: At the first medical examination, the mean age was 20.08 years. The mean spherical equivalent was -3.75 diopter (D) in the right eye and -4.03 D in the left eye based on manifest refraction and -2.59 D in right eye and -2.85 D in left eye using cycloplegic refraction. Eleven of 12 patients had esodeviation with a mean esodeviation of 10.42 D. The pupil size was 3.63 mm in the right eye and 3.63 mm in the left eye. No patient experienced severe miosis (pupil size <2 mm). Observation (5), patching (3), cycloplegics (2), patching + cycloplegics (1) and prism (1) management were performed in 12 patients. Outcomes included completely cured (3), improvement (7) and no change or recurrence (2). CONCLUSIONS: Active management is necessary for patients with convergence spasm and acquired pseudomyopia.