Automatic objective optometers provide a possible alternative to conventional clinical methods of refracting the human eye. Quantitative evaluation of one of these instruments (Dioptron), including a comparison between optometer and subjective refractions, was undertaken to determine how automatic optometers may be utilized most effectively in clinical situations.
The results show a high degree of instrument validity and reliability. The conclusion is that the Dioptron has substantial promise as a means of estimating ametropia—as a replacement for retinoscopy and for screening or monitoring ametropia. However, the use of this instrument as a substitute for subjective refraction procedures does not seem warranted at this time.
Polse KA, Kerr KE. An Automatic Objective OptometerDescription and Clinical Evaluation. Arch Ophthalmol. 1975;93(3):225-231. doi:10.1001/archopht.1975.01010020233013