Light mineral oil viscosity11/10/2023 High osmolarity of the tear film causes water to diffuse out of epithelial cells, further dehydrating the surface. Artificial tears may also reduce redness and swelling and serve to protect the eye from hyperosmolarity. Additionally, inflammation is known to play a role in causing dry eyes and there are artificial tear components that decrease inflammation by disrupting the processes which promotes the recruitment of cytokines. Artificial tears do this by increasing tear viscosity, increasing the adherence of the tears to the ocular surface, decreasing tear evaporation, and decreasing tear clearance. Another treatment goal in ocular surface disease is to increase tear retention. Artificial tears are also lubricants meaning they decrease friction on the ocular surface caused by the eyelid. Humectants are compounds which promote hydration and feel good upon application.
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