Light transmission through intraocular lenses with or without yellow chromophore (blue light filter) and its potential influence on functional vision in everyday environmental conditions

Figures & data

Figure 1. Spectral energy distribution for illuminant A and D65.[7]

Figure 2. Spectral visibility function of the average human eye for daylight and night vision distribution.[6]

Figure 3. Spectral distribution of incandescent signal lights (for bulb light).[7]

Figure 4. Spectral characteristics of intraocular lenses without chromophore light filter.

Figure 5. Spectral characteristic of intraocular lenses with chromophore light filter.

Table 1. Light transmission factor.

	Type of IOL
Light transmission factor (%)	Without chromophore	With chromophore	The difference of factors for IOL without and with blue light chromophore
τ	93.70	87.75	5.95
τvA/day	92.55	82.45	10.1
τvA/night	93.39	86.77	6.62
τvD65/day	92.14	78.41	13.73
τvD65/night	90.43	75.19	15.24
M	92.44	82.11	10.33
SD	1.298	5.367	3.706

Note: IOL = intraocular lenses; τ=mean spectral transmittance; τ_vA/day=luminous transmittance weighted by spectral energy distribution (Illuminant A) for daylight vision; τ_vA/night=luminous transmittance weighted by spectral energy distribution (Illuminant A) for night vision; τ_vD65/day=luminous transmittance weighted by spectral energy distribution (Illuminant D65) for daylight vision; τ_vD65/dnight=luminous transmittance weighted by spectral energy distribution (Illuminant D65) for night vision.

Table 2. Signal light transmission factor.

	Type of IOL
Signal light transmission factor (%)	Without chromophore	With chromophore	The difference of factors for IOL without and with blue light chromophore
τsignR	94.47	88.33	6.14
τsignY	94.06	88.39	5.67
τsignG	92.76	86.85	5.91
τsignB	93.42	87.02	6.40
M	93.68	87.65	6.03
SD	0.75	0.83	0.27

Note: IOL = intraocular lenses; τ_signR=transmittance of red signal lights; τ_signY=transmittance of yellow signal lights; τ_signG=transmittance of green signal lights; τ_signB=transmittance of blue signal lights.

Table 3. Relative visual attenuation quotient for signal light detection factor.

	Type of IOL
Relative visual attenuation quotient for signal light detection factor (%)	Without chromophore	With chromophore	The difference of factors for IOL without and with blue light chromophore
QsignR	1.01	1.01	0.00
QsignY	1.01	1.02	−0.01
QsignG	1.00	0.99	0.01
QsignB	0.99	0.96	0.03
M	1.00	0.995	0.005
SD	0.0096	0.0265	0.0148

Note: IOL = intraocular lenses; Q_signR=relative visual attenuation quotient for red signal light detection; Q_signY=relative visual attenuation quotient for yellow signal light detection; Q_signG=relative visual attenuation quotient for green signal light detection; Q_signB=relative visual attenuation quotient for blue signal light detection.

International Organization for Standardization (ISO). CIE standard illuminants for colorimetry (Standard No. ISO/CIE 10526:1999). Geneva: ISO; 1999.

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CIE Scotopic luminosity curve. Crawford (1949) The scotopic visibility function. Proceedings of the Physical Society. 1951;B62:321–334.

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