Crushing damage from pressure occurs due to pressure *differences*. Imagine you have a rigid container. If you have equal gas pressure inside and outside, the pressure acts on just the walls and the container will survive unless the pressure is high enough to heat/melt the walls to failure. However, if you have high pressure outside and low pressure inside, you can expect the vessel to at some point violently collapse due to the pressure difference.

When diving with a mask, it's important to equalize the pressure inside and outside the mask. E.g. from https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4943308/ 

> Diving can affect the IOP in a number of ways; firstly from the change in the internal mask air pressure at different underwater depths, secondly from the inhaling or exhaling from the nose, and thirdly through the diving mask itself. The first and second factors can be controlled by the diver by exhaling from the nose during descent, also known as equalizing the mask pressure. Senn et al. [5] found that diving mask pressure spikes were less common in experienced divers compared to beginners. Failing to equalize the diving mask pressure can lead to ocular barotrauma, which ranges from lid edema, ecchymosis and subconjunctival hemorrhage to more serious injuries such as hyphema and subperiosteal orbital hemorrhage [6, 7]. The diving mask itself may also affect the IOP. Swimming goggles are known to increase the IOP, with larger-frame goggles having less effect than smaller-frame ones [8,9,10].

Or from https://www.ncbi.nlm.nih.gov/books/NBK545224/

> Mask squeeze is a type of facial barotrauma injury that occurs most commonly while self-contained underwater breathing apparatus (SCUBA) diving or freediving. This condition occurs when divers fail to equalize pressure in the face mask to the surrounding water pressure as they descend. The result is a negative pressure (relative to the surrounding water pressure). The difference in pressure inside and outside the mask can lead to injury of blood vessels and tissue of the eyes and tissue covered by the mask, including forehead, nasal areas, and periorbital regions. The main risk factor for a mask squeeze is the inexperience of the diver. Masks with high internal volume or the use of snorkeling masks or swim masks that do not cover the nose can also increase the risk of this type of injury.

Or, in simpler phrasing, if you have low pressure inside a mask and high pressure inside the rest of the body, the pressure difference is going to push/suck the eyes outward and crush the blood vessels or damage the eye itself. You want to have the same pressure pushing on the eyes from the outside and inside. It's really no different if you 1) have high pressure outside the mask and 'normal' pressure inside the mask, or 2) have low pressure (vacuum) inside the mask and 'normal' pressure outside: both situations have a pressure *difference*, and it's the difference that does the damage.

So, to answer your title question, a mask is more likely to *increase* pressure risks to the eyes rather than to decrease it.