The Low vision specialists evaluate the functional vision of students in USDB classrooms using a variety of tools and techniques, including, acuity, confrontational field, color, contrast sensitivity, and adaptive and/or compensatory behaviors, etc. Tools such as advanced auto-refractor and preferential-looking systems are utilized to determine the visual acuity of the students. Vision clinics are arranged using ophthalmologists and optometrists to perform in-depth evaluations, and provide vision prescriptions. Information, instruction, or consultation regarding vision is impairment is provided to teachers, parents and family members of the students. The low vision specialists also provide in-service trainings to USDB and district staff regarding low-vision assessments.