noun
luminous sensitivity; spectral luminous efficiency
Technical term in photometry and vision science; refers to the sensitivity of the human eye to different wavelengths of light.
視感度曲線は、人間の目の波長ごとの感度を示す。
The luminous sensitivity curve shows the sensitivity of the human eye at each wavelength.
Compound of 視 (shi, 'vision') + 感度 (kando, 'sensitivity').