Which of the following is NOT a common eye condition?

The correct answer identifies synovitis as not a common eye condition. Synovitis refers to inflammation of the synovial membrane, which is found in joints and is not directly related to eye health or conditions affecting the eye.

In contrast, ocular hypertension is a condition where the pressure in the eye is elevated, which can be a risk factor for glaucoma, making it a well-known eye condition. Keratitis refers to inflammation of the cornea, often due to infection, and is a recognized issue that can significantly impact vision. Myopia, also known as nearsightedness, is a common refractive error where close objects are seen clearly, while distant objects appear blurry. This condition is widespread among various populations and is classified as a common eye condition.

Thus, while ocular hypertension, keratitis, and myopia are all conditions associated with the eye, synovitis pertains to joint inflammation and is not part of the common conditions that affect vision or ocular health.