Question

In the grading of Trachoma, Trachomatous Inflammation-Follicular (TF) is defined as the presence of:

• A. Five or more follicles in the lower tarsal conjunctiva
• B. Three or more follicles in the lower tarsal conjunctiva
• C. Five or more follicles in the upper tarsal conjunctiva
• D. Three or more follicles in the upper tarsal conjunctiva

Hint:

TF grading needs 5+ follicles specifically in the upper tarsal conjunctiva.

Answer 1

The Correct Option is C

This question checks the precise WHO definition of TF, the follicular stage of trachoma, in the simplified grading scheme.

1. Five or more follicles in the lower tarsal conjunctiva: Wrong surface; the lower lid is not where this sign is read.
2. Three or more follicles in the lower tarsal conjunctiva: Wrong on both the surface and the follicle count.
3. Five or more follicles in the upper tarsal conjunctiva: This matches the WHO definition exactly, both in the number of follicles and the eyelid surface examined.
4. Three or more follicles in the upper tarsal conjunctiva: Correct surface, but the follicle count needed is five, not three.

To check for TF, the examiner everts the upper eyelid and looks at the upper tarsal conjunctiva for pale, round swellings (follicles) at least 0.5 mm in size. Finding five or more such follicles confirms TF.

Let's summarize:

• TF is read on the upper tarsal conjunctiva, not the lower lid.
• The threshold is five or more follicles, each 0.5 mm or larger.

So the correct answer is five or more follicles in the upper tarsal conjunctiva.