Fig. 2. Liquefaction of human vitreous. The volumes of gel and liquid vitreous in 610 human eyes were measured. The results are plotted versus the age of the donor. Liquid vitreous appears by the age of 5 and increases throughout life until it constitutes more than 50% of the volume of the vitreous during the tenth decade. Gel vitreous volume increases during the first decade while the eye is growing in size. The volume of gel vitreous then remains stable until about age 40, when it begins to decrease simultaneous with the increase in liquid vitreous. (Balazs EA, Denlinger JL: Aging changes in the vitreous. In: Aging and Human Visual Function, pp 45–57. New York, Alan R. Liss, 1982.)