Ultra-wide-field retinal images in an eye with a small-aperture corneal inlay

2015 ◽  
Vol 41 (1) ◽  
pp. 234-236 ◽  
Author(s):  
Reiji Yokota ◽  
Takashi Koto ◽  
Makoto Inoue ◽  
Akito Hirakata
Keyword(s):  
Retinal Images ◽  
Wide Field ◽  
Small Aperture ◽  
Corneal Inlay

Retinal images viewed through a small aperture corneal inlay

2013 ◽  
Vol 92 (2) ◽  
pp. e168-e169 ◽  
Author(s):  
Makoto Inoue ◽  
Hiroko Bissen-Miyajima ◽  
Hiroyuki Arai ◽  
Akito Hirakata
Keyword(s):  
Retinal Images ◽  
Small Aperture ◽  
Corneal Inlay

Persistent corneal fibrosis after explantation of a small-aperture corneal inlay

2019 ◽  
Vol 45 (3) ◽  
pp. 367-371 ◽  
Author(s):  
Norman Romito ◽  
Elena Basli ◽  
Isabelle Goemaere ◽  
Vincent Borderie ◽  
Laurent Laroche ◽  
...  
Keyword(s):  
Small Aperture ◽  
Corneal Inlay

Central and Peripheral Corneal Iron Deposits After Implantation of a Small-aperture Corneal Inlay for Correction of Presbyopia

2011 ◽  
Vol 27 (12) ◽  
pp. 876-880 ◽  
Author(s):  
Alois K. Dexl ◽  
Josef Ruckhofer ◽  
Wolfgang Riha ◽  
Melchior Hohensinn ◽  
Theresa Rueckl ◽  
...  
Keyword(s):  
Small Aperture ◽  
Corneal Inlay ◽  
Iron Deposits

Long-term Results of Combined LASIK and Monocular Small-Aperture Corneal Inlay Implantation

2016 ◽  
Vol 32 (6) ◽  
pp. 379-384 ◽  
Author(s):  
Estera Igras ◽  
Rónán O'Caoimh ◽  
Paul O'Brien ◽  
William Power
Keyword(s):  
Long Term Results ◽  
Small Aperture ◽  
Corneal Inlay

1391 Effect Of Small Aperture Intra-corneal Inlay On Visual Fields

SciVee ◽  
2012 ◽  
Author(s):  
Francisco Sanchez Leon ◽  
Abhiram S. Vilupuru ◽  
George O. Waring, IV ◽  
Eric T. Brooker
Keyword(s):  
Visual Fields ◽  
Small Aperture ◽  
Corneal Inlay

Improving position accuracy for telescopes with small aperture and wide field of view utilizing point spread function modelling

2020 ◽  
Vol 497 (3) ◽  
pp. 4000-4008
Author(s):  
Rongyu Sun ◽  
Shengxian Yu ◽  
Peng Jia ◽  
Changyin Zhao
Keyword(s):  
Point Spread Function ◽  
Large Scale ◽  
Field Of View ◽  
Wide Field ◽  
Position Measurement ◽  
Small Aperture ◽  
Position Accuracy ◽  
Point Spread ◽  
Wide Field Of View ◽  
Spread Function

ABSTRACT Telescopes with a small aperture and a wide field of view are widely used and play a significant role in large-scale state-of-the-art sky survey applications, such as transient detection and near-Earth object observations. However, owing to the specific defects caused by optical aberrations, the image quality and efficiency of source detection are affected. To achieve high-accuracy position measurements, an innovative technique is proposed. First, a large number of raw images are analysed using principal component analysis. Then, the effective point spread function is reconstructed, which reflects the state of the telescope and reveals the characteristics of the imaging process. Finally, based on the point spread function model, the centroids of star images are estimated iteratively. To test the efficiency and reliability of our algorithm, a large number of simulated images are produced, and a telescope with small aperture and wide field of view is utilized to acquire the raw images. The position measurement of sources is performed using our novel method and two other common methods on these data. Based on a comparison of the results, the improvement is investigated, and it is demonstrated that our proposed technique outperforms the others on position accuracy. We explore the limitations and potential gains that may be achieved by applying this technique to custom systems designed specifically for wide-field astronomical applications.

Lesion detection in ultra-wide field retinal images for diabetic retinopathy diagnosis

2018 ◽  
Author(s):  
Anastasia Levenkova ◽  
Michael Kalloniatis ◽  
Angelica Ly ◽  
Arthur Ho ◽  
Arcot Sowmya
Keyword(s):  
Diabetic Retinopathy ◽  
Lesion Detection ◽  
Retinal Images ◽  
Wide Field
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