Crystal formation in the lens in both the young and the aged has been reported by various observers from time to time. The morphology and the chemical nature of the crystals are also of varied nature; for example, Goulden12 and other observers have described crystalline opacities in the lens showing green and blue iridescence in morbid conditions such as thyroid dysfunction, postoperative tetany, mongolian idiocy, and myotonia atrophica. Vogt26 as mentioned by Parker22 has described a "spear cataract" consisting of shiny crystalline needles. Riad24 has reported a pedigree with lens crystals which looked like tiny broken glass fragments, rectangular in shape, with a notch at one corner. Verhoeff reported a case in which protein crystals produced the picture of coralliform cataract.30 Among the varied chemical constituents of the crystals, cholesterol is frequently found in different types of senile, traumatic, and complicated cataracts. The "spear cataract"
CHATTERJEE BM, MUKHERJI MJ, SEN PB. Crystals in the Lens. Arch Ophthalmol. 1962;68(4):468–472. doi:10.1001/archopht.1962.00960030472007
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