Figure 2. Rapid recovery of the visual acuity of the deprived (amblyopic) eye of three kittens that received a period of MD from eye opening (P7) to either 5, 6 or 8 weeks of age and then placed in complete darkness 8 weeks later .

The acuity of the deprived eye (open circles) improved rapidly to normal levels in 5–7 days following the period of darkness without any decrement of the visual acuity of the non‐deprived eye (filled squares, measurements of binocular visual acuity; filled circles, measurements of the acuity of the non‐deprived eye). The brackets to the right of each graph show the range of acuities exhibited by normal kittens of an equivalent age and tested in the same manner. The rearing history of the animals is displayed in schematic form above the individual data; monocular deprivation (hatched bars) from P7 to P37 days (A) or from P7 to P43 (B) or from P7 to P56 (C) followed by complete darkness for 10 days (black bars). The designation of vision as Blind or Open Door are as described in the legend to Fig. 1.