1. |
COMPARISON OF CYCLOPLEGIC AND NON‐CYCLOPLEGIC OCULAR COMPONENT MEASUREMENT IN CHILDREN |
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American Journal of Optometry and Archives of American Academy of Optometry,
Volume 49,
Issue 10,
1972,
Page 805-817
William Ludlam,
Stephen Weinberg,
Chester Twarowski,
Diana Ludlam,
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摘要:
ABSTRACT: A comparison of five independent measurements of the ocular diopiric components utilizing both ultrasonic 2nd photographic phakometric techniques was made on both eyes of twenty children under first non-cycloplegic and then one hour later, cycloplegic conditions. The variances for both the phakometric and ultrasonic measurements made under cycloplegia were not significantly different from those made in the undrugged state. Thus, the hypothesized improvement in reliability accomplisbed through the use of cycloplegia was not found experimentally. Both right and left eye ocular component values determined in the non-cycloplegic state were shown to have significantly higher validity than those for the cycloplegic state.
ISSN:0002-9408
出版商:OVID
年代:1972
数据来源: OVID
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2. |
VISION WITH CHROMATIC FILTERS |
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American Journal of Optometry and Archives of American Academy of Optometry,
Volume 49,
Issue 10,
1972,
Page 818-829
S. Luria,
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摘要:
ABSTRACT: Detection and resolution thresholds for blue and yellow targets against blue, green, and yellow backgrounds were measured while wearing yellow and blue filters. Yellow filters improved thresholds for yellow targets against blue backgrounds. Their effectiveness decreased (i) as the wavelength of :he background increased, (ii) as the size of the target decreased, and (iii) with the age of the observer. The blue fillers were generally ineffective. The results are for the most part explained on the basis of changes in target contrast brought about by the filters. The effectiveness of yellow facemasks for divers under certain conditions is discussed.
ISSN:0002-9408
出版商:OVID
年代:1972
数据来源: OVID
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3. |
A COMPARISON OF BORDER INDUCTION EFFECTS DURING STEADY AND INTERMITTENT ILLUMINATION |
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American Journal of Optometry and Archives of American Academy of Optometry,
Volume 49,
Issue 10,
1972,
Page 830-835
Arnulf Remole,
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摘要:
ABSTRACT: A bright area on a dark ground will take on an enhanced brightness immediately next to the ground. This is known as border enhancement. Another kind of border induction occurs when the luminance of the area is intermittent: for certain frequencies the enhanced region becomes relatively large and develops a textural quality. When the two kinds of border induction are compared with respect to effects of stimulus wavelength and luminance level, it is found that they do not vary in the same manner. This indicates that although the two phenomena may be of the same origin, the relationship between them is not a simple one.
ISSN:0002-9408
出版商:OVID
年代:1972
数据来源: OVID
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4. |
RETINAL LUMINANCE AND ANISEIKONIA |
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American Journal of Optometry and Archives of American Academy of Optometry,
Volume 49,
Issue 10,
1972,
Page 836-839
L. Pickwell,
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摘要:
ABSTRACT: The tilting of the front-parallel plane with a monocular reduction of retinal luminance is considered. The reduction in retinal image size with lower illumination is considered as an explanation with the inconsistencies in the evidence both in frontal plane judgments and observations of the Pulfrich effect. Experimental work shows a tilt of the frontal plane consistent with a shift in the binoculus towards the eye with the higher illumination. This movement of the binoculus is offered as a second factor affecting the frontal plane judgments with unequal retinal luminance.
ISSN:0002-9408
出版商:OVID
年代:1972
数据来源: OVID
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5. |
BODY IMAGERY IN PERCEPTUAL LEARNING |
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American Journal of Optometry and Archives of American Academy of Optometry,
Volume 49,
Issue 10,
1972,
Page 840-846
Arthur Layton,
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摘要:
ABSTRACT: In addition to the general aspects of body imagery, the perceptual system includes (in vision) external projection pathways as an extension of the body schema. The perceptual learning which occurs with movement is concerned primarily with differentiation of the body schema, and is different from that occurring in visually guided motor activity.
ISSN:0002-9408
出版商:OVID
年代:1972
数据来源: OVID
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6. |
THE SIGNIFICANCE OF THE TMC AND HRR COLOR‐VISION-TESTS AS TO RED‐GREEN DEFECTIVENESS |
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American Journal of Optometry and Archives of American Academy of Optometry,
Volume 49,
Issue 10,
1972,
Page 847-858
J. Vos,
W. Verkaik,
J. Boogaard,
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摘要:
ABSTRACT: The HRR and TMC pseudo-isochromatic tests were examined for their structure by statistical analysis of test results. It is concluded that the HRR test is the best, with the restriction, however, that the official scoring method is not optional. An improved scoring, called HRR-R (from “reevaluated”) is proposed.
ISSN:0002-9408
出版商:OVID
年代:1972
数据来源: OVID
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7. |
QUANTIFYING THE DISTRIBUTION OF LACTIC ACID DEHYDROGENASE IN THE CORNEAL EPITHELIUM WITH OXYGEN DEPRIVATION |
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American Journal of Optometry and Archives of American Academy of Optometry,
Volume 49,
Issue 10,
1972,
Page 859-861
A. Augsburger,
R. Hill,
J. King,
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摘要:
ABSTRACT: The practical application of LDH reactivity methods in relation to epithelial anoxia, as described in Part I of this investigation, are demonstrated in relation to the oxygen transmissivity qualities of an experimental contact lens material.
ISSN:0002-9408
出版商:OVID
年代:1972
数据来源: OVID
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8. |
ERROR ANALYSIS OF CORNEAL THICKNESS MEASUREMENTS |
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American Journal of Optometry and Archives of American Academy of Optometry,
Volume 49,
Issue 10,
1972,
Page 862-864
Robert Arner,
Rockfor d,
Roy Rengstorff,
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摘要:
ABSTRACT: Optical devices used to measure thickness are based on specific radii of curvature and indices of refraction. Variations in anterior corneal radii produce negligible changes in the apparent comeal thickness, but changes in the index of refraction cause the cornea to appear thicker or thinner than it actually is.
ISSN:0002-9408
出版商:OVID
年代:1972
数据来源: OVID
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9. |
A NEW TECHNIQUE FOR OBJECTIVELY PLOTTING RETINAL LANDMARKS |
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American Journal of Optometry and Archives of American Academy of Optometry,
Volume 49,
Issue 10,
1972,
Page 865-867
Richard Van Sluyters,
Roger Wiley,
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摘要:
ABSTRACT: An objective method for determining the external projections of retinal landmarks is discussed. Using the simple optical system described, the desired measurements can be obtained accurately and rapidly.
ISSN:0002-9408
出版商:OVID
年代:1972
数据来源: OVID
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10. |
A PRELIMINARY STUDY OF THE SERVICE LIFE OF THE “SOFLENS” |
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American Journal of Optometry and Archives of American Academy of Optometry,
Volume 49,
Issue 10,
1972,
Page 868-869
Maurice Poster,
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摘要:
ABSTRACT: Bacterial penetration was measured using a dialysis chamber on one control lens and five lenses worn for different periods of time. This method was used to determine possible structural change in material after periods of wear.
ISSN:0002-9408
出版商:OVID
年代:1972
数据来源: OVID
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