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Visualization of IOL Material-Induced Changes in Retinal Color Stimulus.

Reiss S, Sperlich K, Kunert M, Guthoff RF, Stolz H, Jünemann A, Stachs O - J Ophthalmol (2016)

Bottom Line: Conclusions.The developed technique provides an approach for determining IOL-specific transmittance behavior and subsequently its influence on the retinal color stimulus.Problems of altered color perception are occasionally reported after cataract surgery and these become obvious with the visualization procedure developed here.

View Article: PubMed Central - PubMed

Affiliation: Institute of Physics, University of Rostock, Albert-Einstein-Straße 23-24, 18059 Rostock, Germany; Department of Ophthalmology, University of Rostock, Doberaner Straße 140, 18057 Rostock, Germany.

ABSTRACT
Purpose. Different IOL materials, particularly blue-light filtering materials, have different spectral transmittance characteristics. The color stimuli, which influence retinal receptors objectively, have consequently implications for color perception. We report on the quantitative determination of IOL-specific transmittance characteristics and present a method visualizing the resultant changes in color stimulus. Methods. A setup was realized to quantify IOL-absorption in a range of 390-780 nm. To visualize the influence of the different spectral transmittance characteristics an algorithm was developed, which converts RGB-pixel values of images into spectra, which performs the corresponding transmittance correction, reconverts to RGB, and reconstructs the image. IOLs of hydrophobic acrylate and hydrophilic acrylate with a hydrophobic surface in each case with/without blue-light filter were examined. Results. Assessment of the reference images verifies the suitability of the pipeline. Evaluation of the transmittance spectra reveals differences of material- and manufacturer-specifics, which are capable of inducing considerable changes in color perception, particularly in the blue color range and mixed colors involving blue. Conclusions. The developed technique provides an approach for determining IOL-specific transmittance behavior and subsequently its influence on the retinal color stimulus. Problems of altered color perception are occasionally reported after cataract surgery and these become obvious with the visualization procedure developed here.

No MeSH data available.


Related in: MedlinePlus

Schematic illustration of the experimental setup for normalization of the intensity spectrum with IOL (for the wavelength 633 nm). The pinhole ensured that no stray light was incident on the power meter (Powermeter 1918-R, Newport Corporation, Irvine, CA/USA).
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fig2: Schematic illustration of the experimental setup for normalization of the intensity spectrum with IOL (for the wavelength 633 nm). The pinhole ensured that no stray light was incident on the power meter (Powermeter 1918-R, Newport Corporation, Irvine, CA/USA).

Mentions: To circumvent this problem we needed to scale IIOL(λ) correctly. With the aid of a HeNe laser at 633 nm and a powermeter, we determined transmittance TPM at this specific wavelength. Since the powermeter has a large detector area, this measurement has the advantage of not being affected by the focusing characteristic of the lens, compared with the entrance slit of a spectrometer, and hence permits laser light to be collected entirely (see Figure 2).


Visualization of IOL Material-Induced Changes in Retinal Color Stimulus.

Reiss S, Sperlich K, Kunert M, Guthoff RF, Stolz H, Jünemann A, Stachs O - J Ophthalmol (2016)

Schematic illustration of the experimental setup for normalization of the intensity spectrum with IOL (for the wavelength 633 nm). The pinhole ensured that no stray light was incident on the power meter (Powermeter 1918-R, Newport Corporation, Irvine, CA/USA).
© Copyright Policy - open-access
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4940547&req=5

fig2: Schematic illustration of the experimental setup for normalization of the intensity spectrum with IOL (for the wavelength 633 nm). The pinhole ensured that no stray light was incident on the power meter (Powermeter 1918-R, Newport Corporation, Irvine, CA/USA).
Mentions: To circumvent this problem we needed to scale IIOL(λ) correctly. With the aid of a HeNe laser at 633 nm and a powermeter, we determined transmittance TPM at this specific wavelength. Since the powermeter has a large detector area, this measurement has the advantage of not being affected by the focusing characteristic of the lens, compared with the entrance slit of a spectrometer, and hence permits laser light to be collected entirely (see Figure 2).

Bottom Line: Conclusions.The developed technique provides an approach for determining IOL-specific transmittance behavior and subsequently its influence on the retinal color stimulus.Problems of altered color perception are occasionally reported after cataract surgery and these become obvious with the visualization procedure developed here.

View Article: PubMed Central - PubMed

Affiliation: Institute of Physics, University of Rostock, Albert-Einstein-Straße 23-24, 18059 Rostock, Germany; Department of Ophthalmology, University of Rostock, Doberaner Straße 140, 18057 Rostock, Germany.

ABSTRACT
Purpose. Different IOL materials, particularly blue-light filtering materials, have different spectral transmittance characteristics. The color stimuli, which influence retinal receptors objectively, have consequently implications for color perception. We report on the quantitative determination of IOL-specific transmittance characteristics and present a method visualizing the resultant changes in color stimulus. Methods. A setup was realized to quantify IOL-absorption in a range of 390-780 nm. To visualize the influence of the different spectral transmittance characteristics an algorithm was developed, which converts RGB-pixel values of images into spectra, which performs the corresponding transmittance correction, reconverts to RGB, and reconstructs the image. IOLs of hydrophobic acrylate and hydrophilic acrylate with a hydrophobic surface in each case with/without blue-light filter were examined. Results. Assessment of the reference images verifies the suitability of the pipeline. Evaluation of the transmittance spectra reveals differences of material- and manufacturer-specifics, which are capable of inducing considerable changes in color perception, particularly in the blue color range and mixed colors involving blue. Conclusions. The developed technique provides an approach for determining IOL-specific transmittance behavior and subsequently its influence on the retinal color stimulus. Problems of altered color perception are occasionally reported after cataract surgery and these become obvious with the visualization procedure developed here.

No MeSH data available.


Related in: MedlinePlus