NORTH CAROLINA STATE BOARD OF OPTICIANS
RX INTERPRETATION EXAMINATION
- REFERENCES:
- Brooks, C.W., and Borish, I.M. System for Ophthalmic Dispensing. Butterworth-Heinemann, Boston 1979.
- Fannin, T.E., and Grosvenor, T. Clinical Optics. Butterworth- Heinemann, Boston, 1987.
- The North Carolina State Board of Opticians RX INTERPRETATION examination may include but will not be limited to the following topics:
- Interpretation and application of current American National Standards Institute (ANSI) guidelines;
- determining reading and intermediate prescriptions;
- transposition to alternate cylinder notations and power cross;
- bifocal selection based on distance prescription and occupational needs;
- progressive addition lens styles;
- corrections for vertical imbalance in the reading portion;
- oblique meridian calculations;
- spherical equivalent;
- focal length;
- prism based on lens decentration;
- power compensation for vertex changes;
- center and edge thickness based on power and prism;
- resolving and resulant prism;
- image size calculations and corrections;
- lens reflections;
- refractive errors including definitions, causes, amblyopia, diplopia and phorias.