Final answer:
A 70 year old patient with HLD and CAD having painless transient monocular visual loss lasting seconds in one eye is most likely to have an embolus from a cardiac source.
Step-by-step explanation:
A 70 year old patient with HLD and CAD having painless transient monocular visual loss lasting seconds in one eye is most likely to have:
A. An embolus from a cardiac source
B. Optic neuritis
C. Increased intracranial pressure
D. Migraine
E. Spontaneous anterior chamber hyphema
The most likely cause for a 70-year-old patient with HLD and CAD experiencing painless transient monocular visual loss is A. An embolus from a cardiac source. This is commonly caused by an embolus or small clot moving from the heart to the eye. This can result in a temporary blockage of blood flow to the eye, leading to visual loss that usually lasts for a few seconds.