Veterinary Ophthalmology Practice Test

The species that exhibits myelination of the optic nerve head is dogs. In dogs, the optic nerve head is myelinated, meaning that it is wrapped in a fatty insulating sheath called myelin. This myelination allows for faster transmission of visual signals from the eye to the brain, which is essential for efficient visual processing.

In contrast, other species such as cats, birds, and rabbits have unmyelinated optic nerve heads. This can lead to differences in the speed and efficiency of visual processing compared to dogs. The presence of myelination in the optic nerve head of dogs contributes to their visual acuity and ability to process visual information quickly, which may reflect their evolutionary adaptations as hunters and visual prey-selectors.

Understanding these anatomical differences is crucial in veterinary ophthalmalogy as it may influence diagnostic processes and treatment decisions for visual disorders in different species.