| 摘要 |
<p>The invention is concerned with a method for the adaptation of hydrophilic-gel contact lenses into a planarized state, which comprises clamping a lens swollen by a volatile swelling agent between two planar or moderately curved surfaces, at least one of which is formed by a thin foil permeable to the volatile swelling agent, and then allowing the swelling agent to penetrate through the permeable foil whereby the lens is transformed into a xerogel state. The lens which is shaped into the planarized form in a strongly swollen state is much softer than the lens heated to a narrow temperature range between the softening temperature and the decomposition temperature of dry gel in the high-temperature planarization. Consequently, the swollen lens adapts much more precisely even to the finest structures of surfaces between or to which it is clamped, thus allowing to form any fine drawings on the lens, which are permanently preserved in the dry state under the common atmospheric conditions and which completely disappear by reswelling.</p> |
