Total Product, Average Product and Marginal Product; Total, average and marginal costs; Determinants of price elasticity of supply; Barriers to Growth and Development; Short-run and long-run equilibrium (Monopolistic Competition) Basic Development Concepts; Perfect Competition
What Is Diplopia? Diplopia, or double vision, is a condition where a single object is seen in duplicate. Double and blurred vision are often thought to be the same, but they are not. In blurred vision, a single image seen by one eye appears unclear. Eyes wander or appear crossed or misaligned.
Page last modified: June 14, 2009 Disorders where one eye is higher than the other often cause vertical double vision (diplopia). Common causes include: Disorders where one eye is higher than the other often cause vertical double vision (diplopia). Common causes include: 1  Ocular muscle weakness (called hyper deviation).2  Central ocular control disturbances (here it is called skew).3  Otolithic imbalance (also called skew).hen it occurs even when both eyes are viewing, it is called a hyper deviation. Hyperphoria and hyperdeviation generally refer to the situation where the cause is known. For example, ocular palsies such as 4th nerve palsy can cause a hyper deviation or phoria.