An instrument for measuring the distance between the centres of rotation of the two eyes

1912 ◽  
Vol 85 (576) ◽  
pp. 53-55
Keyword(s):  
Binocular Vision ◽  
Measuring Instrument ◽  
Optical Axes

A knowledge of the distance between the two eyes being required in dealing with the problems of binocular vision, the instruments described in this paper may be of interest to physiologists. All those methods which involve measurement of the distance between the pupils (or other external parts of the eyes) are liable to errors, for the following reasons:— 1. It is difficult to eliminate parallax between the scale or index of the measuring instrument and the eyes. 2. The distance between the pupils is affected by the convergence of the optical axes, and still more by the abnormal direction of either. 3. It is difficult to ensure the eyes being kept still during the process of measuring.

scholarly journals Precision Measuring Instrument and Method of Fertilizer Shape Characteristics Based on Binocular Vision

2020 ◽  
Author(s):  
Jinxing Wang ◽  
Hongjian Zhang ◽  
Xuemei Liu ◽  
Shuangxi Liu ◽  
Hao Jiang ◽  
...  
Keyword(s):  
Binocular Vision ◽  
Measuring Instrument ◽  
Precision Measuring ◽  
Shape Characteristics

Actin and α-tubulin immuno-EM labelings reveal differences in intra versus interphotoreceptor matrix

1990 ◽  
Vol 48 (3) ◽  
pp. 466-467
Author(s):  
Matti Järvilehto ◽  
Riitta Harjula
Keyword(s):  
Compound Eye ◽  
Frozen Section ◽  
Smooth Muscle Actin ◽  
Photoreceptor Cells ◽  
Immune Serum ◽  
Cell Organelles ◽  
Calliphora Erythrocephala ◽  
Optical Axes ◽  
Interphotoreceptor Matrix ◽  
Similar Kind

The photoreceptor cells in the compound eyes of higher diptera are clustered in groups (ommatidia) of eight receptor cells. The cells from six adjacent ommatidia are organized into optical units, neuro-ommatia sharing the same visual field. In those ommatidia the optical axes of the photopigment containing structures (rhabdomeres) are parallel. The rhabdomeres of the photoreceptor cells are separated from each other by an interstitial i.e innerommatidial space (IOS). In the photoreceptor cell body, besides of the normal cell organelles, a cellular matrix is a structurally apparent component. Similar kind of reticular formation is also found in the IOS containing some unidentified filamentary substance, of which composition and functional significance for optical properties of vision is the aim of this report.The prefixed (2% PA + 0.2% GA in 0.1-n phosphate buffer, pH 7.4, for 1h), frozen section blocks of the compound eye of the blowfly (Calliphora erythrocephala) were prepared by immuno-cryo-techniques. The ultrathin cryosections were incubated with antibodies of monoclonal α-tubulin and polyclonal smooth muscle actin. Control labelings of excess of antigen, non-immune serum and non-present antibody were perforated.

Curiosities of Binocular Vision

1913 ◽  
Vol 76 (1964supp) ◽  
pp. 122-123
Author(s):  
Frederic Campbell
Keyword(s):  
Binocular Vision

The Software «MMI–calibration 3.0»

Metrologiya ◽  
2020 ◽  
pp. 16-24
Author(s):  
Alexandr D. Chikmarev
Keyword(s):  
Power Series ◽  
Data Processing ◽  
Statistical Treatment ◽  
Correction Function ◽  
Calibration Function ◽  
Measuring Instrument ◽  
Working Standard ◽  
Calibration Protocol ◽  
Error Probabilities ◽  
Continuous Power

A single program has been developed to ensure that the final result of the data processing of the measurement calibration protocol is obtained under normal conditions. The calibration result contains a calibration function or a correction function in the form of a continuous sedate series and a calibration chart based on typical additive error probabilities. Solved the problem of the statistical treatment of the calibration protocol measuring in normal conditions within a single program “MMI–calibration 3.0” that includes identification of the calibration function in a continuous power series of indications of a measuring instrument and chart calibration. An example of solving the problem of calibration of the thermometer by the working standard of the 3rd grade with the help of the “MMI-calibration 3.0” program.

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