[moron4hire]

It's forcing your pupils to constrict. Decreasing the aperture size on a lens increases the field of view. So, while your eye might not be able to accommodate at the correct distance given the current convergence point, there is more room for error. It's a fairly common method in photography, in cases where one might have difficulty getting a correct focus on a subject. It's not a "fix", but a compensation.

[wtallis]

Depth of field is what expands with smaller apertures, not field of view. The former is the range of distances that are "in focus", and the latter is the angular width of the the scene.

[hellofunk]

> Decreasing the aperture size on a lens increases the field of view.

No, the aperture has no effect on the field of view. They are orthogonal features of how a lens works.

[PaulHoule]

I think the commentator meant "depth of field"

[moron4hire]

yes, didn't have my first coffee yet