POSTOPERATIVE temporary lenses of many types are currently on the market. Most are tinted, and the cost is above $5. In large municipal institutions, the procurement, maintenance, and return of these lenses have been a chronic problem. Recently, we have been able to fashion a paper thin, plastic, disposable postoperative cataract lens of about +14.00 diopters for 30 cents (Fig 1).
August Fresnel, in the early 1800s, first conceived the idea of a wafer thin lens of high dioptric power. The principle is a simple one. One side of the lens is flat. The other side is a series of concentric grooves engraved in the surface so that each groove is at a slightly less steep angle as one progresses from the periphery of the lens to the center. This produces a series of prisms in decreasing powers as one proceeds from the periphery to the center. Light entering
Gordonson LC. Postoperative Cataract Lenses. Arch Ophthalmol. 1970;84(1):62. doi:10.1001/archopht.1970.00990040064014