Final answer:
The examiner should score the visual function considering the patient's visual ability in their better eye, although no specific scoring procedure is provided. Conditions like bilateral hemianopia and internuclear ophthalmoplegia illustrate different presentations and would be assessed differently.
Step-by-step explanation:
The question refers to a clinical scenario where a patient has severe monocular visual loss due to intrinsic eye disease in one eye and normal visual fields in the other eye. In assessing such a patient, the examiner should typically score the visual function based on the patient's better eye. However, if the question relates to a specific grading system or assessment procedure, additional context or guidelines from that system would be required to provide an accurate score.
In cases of monocular visual loss, the extent of the loss and the impact on the patient's daily activities are considered. Severe visual loss in one eye can still significantly affect a patient's quality of life, even if the other eye has normal vision.
According to the information provided, it's important to differentiate between various conditions such as bilateral hemianopia, which is the loss of lateral peripheral vision usually caused by a lesion at the optic chiasm, and conditions like internuclear ophthalmoplegia that can cause diplopia. Both conditions reflect different pathologies and would be assessed differently.