The rarity of an eye shape is subjective and depends on the population being considered. However, based on general observations, a definitively "rare" eye shape isn't universally agreed upon; common eye shapes vary by ethnicity and geographic region.
The reference material indicates that almond, monolid, downturned, and hooded are all recognizable eye shapes, implying that none are so rare as to be unheard of. Rarity would likely be determined by specific populations. For example:
- Monolid eyes are common in people of East Asian descent but less common in European populations.
- Hooded eyes are also very common and are determined by your genes.
Because the question does not provide parameters for which population to consider, or a definition of "rare", determining a single, rare eye shape is impossible without making an assumption.
