Simultaneous three wavelength imaging with a scanning laser ophthalmoscope

Reinholz, Fred; Ashman, Ross A.; Eikelboom, Robert H.

doi:10.1002/(sici)1097-0320(19991101)37:3<165::aid-cyto1>3.0.co;2-a

Cited by 20 publications

(10 citation statements)

References 17 publications

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“…The use of infrared digital CSLO enables fundic visualization through moderate nuclear lens opacities 5 , 36 –38 which is not possible using regular angiography. The use of another monochromatic laser light source 39 would enable development of this technique in the future. This technique is noninvasive and can be used easily if the eyeball is fixed and the eyelids are maintained open.…”

Section: Discussionmentioning

confidence: 99%

Ocular fundus images with confocal scanning laser ophthalmoscopy in the dog, monkey and minipig

Rosolen¹,

Saint-Macary

Gautier

et al. 2001

Veterinary Ophthalmology

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Confocal scanning laser ophthalmoscopy (CSLO) is a new technique that enables ocular fundus image recording and retinal dynamic angiography to be performed. The ocular fundus image is acquired sequentially, point by point, and is reconstructed on a video monitor at the rate of 25 images per second. The feasibility of performing both ocular fundus image recordings and retinal angiography image recordings were tested on two dogs, two monkeys and two minipigs using a 40 degrees field I + Tech CSLO. Fundus area of each dog, monkey and minipig were examined without any additional optical devices. The ocular fundus and angiography images were recorded, stabilized and analyzed under the same conditions. For each species, all images were easily recorded without any additional optical device in a lighted room and the morphology of the retinal images generated was similar to those obtained with a camera or angiography of higher resolution. Capillary phase or venous times are presented. Image recording at 25 frames/second enabled more retinal dynamics to be demonstrated than with use of regular angiography. This technique is noninvasive and easy to perform if the eye is fixed and eyelids maintained open. It also allows exploration of retinal microvascularization and could be utilized for clinical, pharmacologic and toxicologic investigations as well.

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Section: Discussionmentioning

confidence: 99%

Ocular fundus images with confocal scanning laser ophthalmoscopy in the dog, monkey and minipig

Rosolen¹,

Saint-Macary

Gautier

et al. 2001

Veterinary Ophthalmology

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“…We have previously described a scanning laser ophthalmoscope for recording images with three wavelengths simultaneously [8,9]. The laser lines launched into the SLO included the 488 nm, 514 nm lines of an Ar + -ion laser, the 633 nm line of a HeNe laser, and the 532 nm line of a frequency doubled Nd:YVO 4 laser.…”

Section: Methodsmentioning

confidence: 99%

Improvements in Colour Fundus Imaging Using Scanning Laser Ophthalmoscopy

2001

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The objective of this study was to examine the properties of two laser lines 514 nm and 532 nm when used to image the retina with a scanning laser ophthalmoscope (SLO), and to compare the images taken with a simultaneous multiple wavelength SLO, to those taken with a fundus camera. From this we concluded that the 514 nm line is the preferred line for visualising the nerve fibre layer whereas the 532 nm line is preferred for visualising retinal vessels. Based on these results the 532 nm laser light source was selected as the green line for imaging with the simultaneous colour SLO. Cases are presented where the colour SLO images contain more information than traditional digitised fundus photographs.

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“…According to the geometry, the chromatic aberration can be divided into longitudinal chromatic aberration (or axial chromatic aberration, LCA) and transverse chromatic aberration (or lateral chromatic aberration, TCA). Chromatic aberrations a®ect the resolution of the multi-wavelength fundus imaging [2][3][4] and reduce the visual function of a human eye with an intraocular lens (IOL). [5][6][7][8] In order to eliminate the negative in°uence of the chromatic aberrations in multi-wavelength imaging and design of achromatic IOLs, 9,10 it is necessary to study the chromatic aberrations of the human eye.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous quantification of longitudinal and transverse ocular chromatic aberrations with Hartmann–Shack wavefront sensor

Deng

Zhao

Dai

et al. 2018

J. Innov. Opt. Health Sci.

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A simple method to objectively and simultaneously measure eye's longitudinal and transverse chromatic aberrations was proposed. A dual-wavelength wavefront measurement system using two Hartmann-Shack wavefront sensors was developed. The wavefronts of the red (639.1 nm) and near-infrared (786.0 nm) lights were measured simultaneously for di®erent positions in the model eye. The chromatic wavefronts were converted into Zernike polynomials. The Zernike tilt coe±cient (¯rst term) was used to calculate the transverse chromatic aberration along the x-direction, while the Zernike defocus coe±cient (fourth term) was used to calculate the longitudinal chromatic aberration. The measurement and simulation data were consistent.

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Simultaneous three wavelength imaging with a scanning laser ophthalmoscope

Cited by 20 publications

References 17 publications

Ocular fundus images with confocal scanning laser ophthalmoscopy in the dog, monkey and minipig

Ocular fundus images with confocal scanning laser ophthalmoscopy in the dog, monkey and minipig

Improvements in Colour Fundus Imaging Using Scanning Laser Ophthalmoscopy

Simultaneous quantification of longitudinal and transverse ocular chromatic aberrations with Hartmann–Shack wavefront sensor

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