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Continuous recording of accommodation and pupil size using the Shin-Nippon SRW-5000 autorefractor


, : Continuous recording of accommodation and pupil size using the Shin-Nippon SRW-5000 autorefractor. Ophthalmic & Physiological Optics 21(2): 108-113

A newly released commercial autorefractor, the Shin-Nippon SRW-5000 (Japan), has been found to be valid compared to subjective refraction and repeatable over a wide prescription range. Its binocular open field-of-view allows the accommodative state to be monitored while a natural environment is viewed. In conventional static mode, the device can take up to 45 readings in 1 min using digital image analysis of the reflected retinal image of a measurement ring. Continuous on-line analysis of the ring provides high (up to 60 Hz) temporal resolution of the refractive state to an accuracy of < 0.001 D. Pupil size can also be analysed to a resolution of < 0.001 mm. The measurement of accommodation and pupil size was relatively unaffected by eccentricity of viewing up to +/- 10 degrees and instrument focusing inaccuracies of +/- 5 mm. The resolution properties of the analysis are shown to be ideal for measurement of dynamic accommodation and pupil responses.

US$29.90

PMID: 11261344


Other references

Macmillan, K.; Loree, K.; Mapletoft, R.J.; Colazo, M.G., 2017: Short communication: Optimization of a timed artificial insemination program for reproductive management of heifers in Canadian dairy herds. Pregnancy per AI (P/AI) following the use of 1 of 2 timed AI (TAI) protocols and 2 different intervals between TAI and resynchronization were compared in heifers that were inseminated with either conventional or sex-sorted semen. Holstein heifers...

Myhre B.A.; Nakasaka Y.; Schott R., 1975: Chemical and cytological changes occurring in frozen thawed blood stored at 4 celsius. Transfusion (Bethesda) 15(5): 516

Caraiody, G.R.; Jr., 1967: Crossability, sexual isolation, and salivary gland chromosomes of two strains of the Drosophiia paulistorum complex that cross to Drosphila equinoxialis. Dissertation Abstracts, 28B 2182-2183

Rayner, M., 1963: The Lesser Black-backed Gull in Derbyshire. Bird Study, 10: 211-218

Manjunatha, M.V.; Shukla, K.N.; Chauhan, H.S.; Singh, S., 2000: Evaluation of hydraulic characteristics of various micro-sprinklers. Tests were conducted to characterise the performance of eight commercially available spinner type microsprinklers. The tests were conducted for 4 different operating pressures (0.5. 1.0, 1.5, 2.0 Kg/cm2) and 4 riser heights (20,35, 50, 65 cm). Stu...

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Gorman, C.A., 1969: Board examinations: arbitrary rites. New England Journal of Medicine 280(17): 960-961

Scatton, O.; Plasse, Mène.; Dondero, Fédérica.; Vilgrain, Vérie.; Sauvanet, A.; Belghiti, J., 2008: Impact of localized congestion related to venous deprivation after hepatectomy. Objective. We sought to assess the impact of localized venous congestion related to venous deprivation on liver function recovery and regeneration after hepatectomy, using the living donation model. Harvesting the middle hepatic vein (MHV) optimi...

Drujan, B.D., 1982: Biochemical correlates of the S-potential. Progress in Clinical and Biological Research 113: 281-305

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