Abstract: A system and method for objectively testing for ocular changes including age-related macular degeneration through reliance on involuntary physical reactions such as the fixation reflex and optokinetic nystagmus. A narrow band of visible blue light is beamed at the patient's eye through alternate apertures in a mask which are separated by a relatively small angle of subtendance at the entrance pupil. In the presence of a healthy macula, the blue light is filtered out and the fixation reflex is absent. Conversely, if the macula is in the process of degenerating by the progressive loss of protective pigments, then the impinging of the narrow band of visible blue light upon the macula, via the alternate apertures, will evoke the fixation reflex.

Abstract: Laundry detergent compositions giving improved oily soil detergency in the machine wash, especially on knitted cotton and knitted polyviscose fabrics, contain an anionic sulphonate surfactant and a zwitterionic betaine surfactant in a weight ratio of 2:1 to 99:1, preferably 3:1 to 25:1. The preferred anionic surfactant is linear alkylbenzene sulphonate and the preferred betaine surfactant is cocoamidopropyl betaine.