To protect your eyes from harsh sunlight while at the beach make sure to wear sunglasses with UV protection lenses while under direct exposure to sun's rays as this will help reduce glare and block harmful UV rays that could potentially damage your vision over time if not properly protected against them. Additionally, wearing a wide brimmed hat can help shade your eyes from direct sunlight and provide further protection. Finally, try to limit the amount of time you spend staring directly into the sun as this can also lead to eye strain and fatigue.