For years the so-called "type C" or "daylight" illumination for color vision testing has been available in the form of the Macbeth Easel Lamp. Modern substitutes are relatively expensive and may provide only a limited field of illumination. They also limit the portability of accurate color testing from lane to lane, forcing the practitioner to move the patient to the test light. C Daylight™ Glasses are worn by the patient and can be used with any ordinary 60, 75 or 100 W soft white or standard bulb. A pair can be kept with each test in the office, thus making color vision testing a convenient process anywhere incandescent illumination is available.
Note: To avoid light damage to these glasses, store in the provided UV proof bag.