Bishop Prism

Features

• 50 diopters with magnets mounted for use with the base plate
• The Bishop Dual Prism Alignment System is a new tool developed to provide advantages in measuring large-angle strabismus prior to correction
• In strabismus, one eye looks directly at the object being viewed while the other eye is misaligned inward (esotropia), outward (exotropia), upward (hypertropia), or downward (hypotropia)
• When the misalignment of the eyes is large the strabismus is called "large-angle," referring to the angle of deviation between the line of sight of the straight eye and that of the misaligned eye
• Accurately measuring the degree of strabismus using prisms is critically important when preparing for strabismus correction
• With the Bishop Tool, two base-in or base-out prisms are held in place using magnetic fixation to a metal plate with a ferrous surface
• The tool with the two prisms can be positioned using one hand, freeing the other hand for note-taking and/or cross-eye cover testing
• The prisms can be placed base in, base out, spaced for the patient’s PD, and are held correctly in the horizontal and frontal planes by magnetic fixation to the plate