What is the purpose of dilation during an eye exam?

The purpose of dilation during an eye exam is primarily to allow better visualization of the internal structures of the eye. When the pupil is dilated using special eye drops, it expands in size, which facilitates a more comprehensive examination of the retina, optic nerve, and other internal components. This enhanced view is crucial for detecting various eye conditions, such as retinal tears, macular degeneration, and diabetic retinopathy, which may not be visible with a normal-sized pupil.

The other options refer to different aspects of an eye exam. Peripheral vision assessment involves various tests, such as visual field tests, which do not primarily rely on pupil dilation. Measuring intraocular pressure is typically done with tonometry and also does not require dilation. Detecting color blindness is assessed through specific tests and does not necessitate the pupil to be dilated. In summary, dilation serves a unique and essential role in enhancing the ability to inspect the eye's internal structures clearly.