Optical lens

The invention provides an optical lens, which comprises seven lenses in total, and sequentially comprises a first lens with negative focal power, a second lens with negative focal power, a third lens with positive focal power, a fourth lens with negative focal power, a fifth lens with negative focal power and a sixth lens with negative focal power from an object side to an imaging surface, the second lens has negative focal power; the third lens has positive focal power; the fourth lens has negative focal power; the fifth lens has positive focal power, and the image side surface of the fifth lens is a convex surface; the sixth lens has positive focal power; the seventh lens has negative focal power; the sixth lens has a meniscus shape; and the curvature radius R11 of the object side surface of the sixth lens and the curvature radius R12 of the image side surface of the sixth lens meet the following condition:-0.99 < = (R11-R12)/(R11 + R12) < = 0.97. According to the optical lens, through reasonable configurat