The search results do not explicitly identify a specific person as the advocator of "lower visual angles." However, in the context of visual angle research and perceived visual angle illusions, some researchers who have notably contributed to understanding variations in perceived visual angles include Murray, Boyaci, and Kersten (2006), along with earlier vision researchers like Joynson, McCready, Rock & McDermott, and others. These researchers have advocated and studied how subjective perceived visual angles can differ from the physical visual angles.
The concept of "lower visual angles" specifically is unclear from the available sources, as the term is not commonly highlighted on its own but rather as part of a broader study of visual angles and perception. Therefore, it could mean the advocacy of using smaller or more precise visual angles in vision research or technology, but no clear single advocator is documented. If you have a more specific context or definition for "lower visual angles," such as in a particular field (e.g., ophthalmology, optics, visual cognition), please clarify, and I could try to refine the search or explanation.
