[The visual field of pseudophakic patients. Perimetric and statistical study]

One hundred and twenty two visual fields were studied in 98 pseudophakic subjects, using cinetic perimetry according to Goldmann, in order to plot the internal (I1), medium (I2) and peripheral (I4) isopters. Computerized processing of data provided average results, allowing the following conclusions: In general, 20% of the total surface is lost in pseudophakia. This loss, as a consequence of prismatic effects of lenses, involves the internal isopters (26%) rather than the peripheral isopters (15%). Individually, these data can be modified by the location of the lens or by the diameter of its optical part: the more anterior or the smaller is the optical part, the narrower does the visual field become. Additional correction, particularly if exceeding 2 diopters is a supplementary factor of reduction. The perimetric consequences of pseudophakia are functionally latent. Nevertheless, the prismatic effects of intraocular lenses could account for the difficulties met in examination of peripheral fundus.