Optonet Vision Unit Documentation
Please note that this User Guide is being currently updated; new sections will be added shortly.
The Optonet Vision Unit contains a battery of VA charts for both distance and near vision. First, the main Refraction menu shows a group containing the available VA tests. You can choose between charts with letters, numbers, Landolt C’s or Snellen E’s.
The last two options, “Broken Glasses” and symmetrical letters, (HOTV test) are especially designed for testing preschool children.