scholarly journals Binocular benefits of optical treatment in anisometropic amblyopia

2018 ◽  
Vol 18 (4) ◽  
pp. 6 ◽  
Author(s):  
Jiafeng Wang ◽  
Lixia Feng ◽  
Yonghua Wang ◽  
Jiawei Zhou ◽  
Robert F. Hess
Keyword(s):  
Anisometropic Amblyopia ◽  
Optical Treatment

scholarly journals Optical Treatment of Strabismic and Combined Strabismic–Anisometropic Amblyopia

Ophthalmology ◽  
2012 ◽  
Vol 119 (1) ◽  
pp. 150-158 ◽  
Author(s):  
Susan A. Cotter ◽  
Nicole C. Foster ◽  
Jonathan M. Holmes ◽  
B. Michele Melia ◽  
David K. Wallace ◽  
...  
Keyword(s):  
Anisometropic Amblyopia ◽  
Optical Treatment

The Theoretical Contrast in Scanning and Conventional High Resolution Microscopes

1969 ◽  
Vol 27 ◽  
pp. 170-171
Author(s):  
E. Zeitler ◽  
M. G. R. Thomson
Keyword(s):  
Small Volume ◽  
Volume Element ◽  
Optical Processing ◽  
Image Construction ◽  
Object Interaction ◽  
Transmission Electron ◽  
Scanning Transmission ◽  
Optical Treatment ◽  
Electron Microscopes ◽  
Intensity Contrast

In the formation of an image each small volume element of the object is correlated to an areal element in the image. The structure or detail of the object is represented by changes in intensity from element to element, and this variation of intensity (contrast) is determined by the interaction of the electrons with the specimen, and by the optical processing of the information-carrying electrons. Both conventional and scanning transmission electron microscopes form images which may be considered in this way, but the mechanism of image construction is very different in the two cases. Although the electron-object interaction is the same, the optical treatment differs.

Chromatic aberration and low-voltage SEM

1987 ◽  
Vol 45 ◽  
pp. 546-547
Author(s):  
Zhifeng Shao ◽  
A.V. Crewe
Keyword(s):  
Electron Energy ◽  
Low Voltage ◽  
Spherical Aberration ◽  
Chromatic Aberration ◽  
Primary Electron ◽  
Probe Size ◽  
Non Local ◽  
Optical Treatment ◽  
Electron Microscopes ◽  
Scanning Electron Microscopes

For scanning electron microscopes, it is plausible that by lowering the primary electron energy, one can decrease the volume of interaction and improve resolution. As shown by Crewe /1/, at V0 =5kV a 10Å resolution (including non-local effects) is possible. To achieve this, we would need a probe size about 5Å. However, at low voltages, the chromatic aberration becomes the major concern even for field emission sources. In this case, δV/V = 0.1 V/5kV = 2x10-5. As a rough estimate, it has been shown that /2/ the chromatic aberration δC should be less than ⅓ of δ0 the probe size determined by diffraction and spherical aberration in order to neglect its effect. But this did not take into account the distribution of electron energy. We will show that by using a wave optical treatment, the tolerance on the chromatic aberration is much larger than we expected.

BICOLOR OPTICAL TREATMENT OF MULTI-LAYERS FILM SAMPLES

2010 ◽  
Vol 24 (08) ◽  
pp. 937-942 ◽  
Author(s):  
K. OZGA ◽  
J. EBOTHÉ ◽  
H. NGUYEN CONG ◽  
D. MARTEL ◽  
W. GRUHN ◽  
...  
Keyword(s):  
Electric Field ◽  
Power Density ◽  
Local Heating ◽  
Independent Measurement ◽  
Yag Lasers ◽  
Optical Susceptibility ◽  
Dc Electric Field ◽  
Optical Treatment ◽  
532 Nm ◽  
Multi Layer Film

In the present paper, we study the influence of simultaneous polarized optical treatment (10 ns Nd: YAG lasers with wavelengths 1064 nm and 532 nm with power density 0.6 GW/cm2) together with electrostatic dc electric field (up to 8 kV/cm) on self-assembled multi-layer film samples. The second-order optical susceptibility (SOS) achieves the maximal values after one minute simultaneous dc electrical-optical treatment. Further treatment will not enhance the values and even leads to the decrease of SOS. The independent measurement of the local temperature shows that local heating does not exceed 10.1 K.

scholarly journals Assessment of the Utility of Plusoptix A09 Handheld Photo-refractometer in Screening Refractory Errors and Amblyopia in Children

2021 ◽  
Vol 11 (01) ◽  
pp. e110-e113
Author(s):  
Muhammed Selcuk Sinanoglu ◽  
Yakıncı Cengiz ◽  
Soner Demirel
Keyword(s):  
Predictive Value ◽  
Primary Schools ◽  
National Education ◽  
Anisometropic Amblyopia ◽  
Remote Measurements ◽  
Minimum Number ◽  
Eye Examination ◽  
The Mean ◽  
Screening Sensitivity ◽  
Frequent Reason

AbstractThe aim of this study is to find out the frequency of anisometropic amblyopia in children and to increase awareness about this disease. All children between the ages of 4 and 10 years who were attending 11 kindergarten and primary schools determined by provincial directorate for national education in the center of Malatya were included. A screening team including interns and a resident from the Department of Pediatrics have used Plusoptix A09 handheld photo-refractometer device for detecting amblyopia and its reasons. A total of 7,000 students were screened. The mean age of the students was 7.4 ± 2 years. Amblyopia was suspected in 357 cases with the Plusoptix S09 screening. After eye examinations performed by an ophthalmologist, 303 cases were found to have pathologic eye examination. Amblyopia was found in 67 (18.8%) of the 303 cases, and anisometropic amblyopia was found in 59 of 67 cases. As a result of the screening, sensitivity of Plusoptix A09 was found to be 88.1%, while its specificity was found to be 88.6%. Its positive predictive value was found to be 64.0% and its negative predictive value was found to be 97.0%. We believe that with screenings performed by health professionals who are given short-term training by using a device that can conduct remote measurements, detection of anisometropic amblyopia, which is the most frequent reason for amblyopia, can be done in a fast and relatively less expensive way and with the minimum number of specialist physician required. This way, children with amblyopia can reach the ophthalmologist earlier for treatment.

Abnormal Function of the Parvocellular Visual System in Anisometropic Amblyopia

2000 ◽  
Vol 37 (2) ◽  
pp. 73-78
Author(s):  
Yang Shan ◽  
Mark L Moster ◽  
Richard A Roemer ◽  
John B Siegfried
Keyword(s):  
Visual System ◽  
Anisometropic Amblyopia
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