A 3-step diagnostic test used to identify which extraocular muscle is paretic in double vision, acquired hypertropia, or vertical diplopia. It is a time-honored test using an algorithmic approach to determine ocular motility patterns that are in line with the disorders of specific vertically acting extraocular muscles.

Also Known As

  • Parks-Bielschowsky Three-Step Test
  • Parks-Helveston 3 Step Test
  • Parks Three-Step Test
  • Bielschowsky Head Tilt Test