When Vision Fluctuates, Look to the Tear Film First - Takeaways - MDSpire

When Vision Fluctuates, Look to the Tear Film First

Dr. Theriot discusses the differences between natural tear film and artificial tears—and why the change in moniker to "lubricating drops" is appropriate.

  • By

  • Pamela E. Theriot, OD

  • May 1, 2026

  • 3 min

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  • 1

    Blinking stabilizes the tear film, optimizing visual performance by creating a smooth refractive surface and reducing optical aberrations.

  • 2

    Intermittent blurry vision during refraction often indicates dry eye disease, which can result from inadequate tear production or poor quality tears.

  • 3

    Artificial tears can improve vision clarity during refraction, allowing patients to achieve clearer images when their tears break up.

  • 4

    Lubricating drops containing hydroxypropyl guar (HP Guar) protect the cornea and promote epithelial cell repair and regeneration.

  • 5

    Renaming artificial tears to lubricating drops sets realistic expectations, as they provide symptomatic relief without mimicking natural tear homeostasis.

Original Source(s)

When Vision Fluctuates, Look to the Tear Film First

  • by Pamela E. Theriot, OD

  • May 1, 2026

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