2020–2021 BCSC Basic and Clinical Science Course™
Chapter 6: The Patient With Illusions, Hallucinations, and Disorders of Higher Cortical Function
The Patient With Visual Illusions and Distortions
Depending on the affected area (the primary visual cortex [V1] or the associative areas V2, V3, and V4), occipital lobe pathology may alter the perceived shape and position of an object, change perception of motion, cause color vision loss, or induce multiplicity of images. Patients with parietal lobe abnormalities commonly experience disorders of visual perception, such as micropsia, macropsia, teleopsia (objects appearing too distant), and pelopsia (objects appearing too close). See Chapter 1 for anatomy discussion.
Excerpted from BCSC 2020-2021 series: Section 5 - Neuro-Ophthalmology. For more information and to purchase the entire series, please visit https://www.aao.org/bcsc.