In this medical analogy, “Eye is to Myopia as Teeth is to ______”. Choose the disease or condition that is related to teeth in the same way that myopia is related to the eye.

Introduction / Context:
This verbal analogy links organs of the human body with diseases that commonly affect them. The pattern is “Eye : Myopia :: Teeth : ?”. Such questions are very common in general aptitude and general knowledge tests because they check basic awareness of medical terms and the ability to pair an organ with an associated disorder.

Given Data / Assumptions:

• Organ in first pair: Eye. • Disease in first pair: Myopia (short sightedness). • Organ in second pair: Teeth. • Options: Cataract, Trachoma, Eczema, Pyorrhea. • We assume standard school level knowledge of which part of the body each disease affects.

Concept / Approach:
The relationship in the first pair is “organ : disease that affects that organ”. Myopia is a defect of vision where a person can see near objects clearly but distant objects appear blurred. It specifically affects the eye. We must therefore select an option that names a disease or disorder which primarily affects the teeth or the supporting structures around them, keeping the relation strictly parallel between the two pairs.

Step-by-Step Solution:
Step 1: Confirm the first relationship. Eye is the organ, and myopia is a common eye defect. So the pattern is “organ : its disease or defect”. Step 2: Examine each option in relation to teeth. Cataract is an opacity of the lens that affects the eye, not the teeth. Trachoma is an infectious disease of the eye, involving the conjunctiva and cornea. Eczema is an inflammatory condition of the skin, not of the teeth. Pyorrhea is a disease of the gums and supporting tissues of the teeth, often associated with discharge of pus and loosening of teeth. Step 3: Only pyorrhea has a direct and standard association with the teeth and their surrounding structures in dental health.

Verification / Alternative check:
In general reasoning books and competitive exam material, myopia and pyorrhea often appear as typical examples of diseases of the eye and teeth respectively. The other options belong clearly to different organs: cataract and trachoma for eyes, eczema for skin. Because the analogy demands the same kind of relationship across both sides, we need a disease of the teeth or gums to match teeth in the second pair. Pyorrhea fits perfectly into this slot.

Why Other Options Are Wrong:
• Cataract: A disease of the eye lens causing clouding of vision, so it matches eye, not teeth. • Trachoma: An infectious eye disease affecting the conjunctiva and cornea, again linked with the eye. • Eczema: A skin condition causing irritation and inflammation, not associated with teeth or gums.

Common Pitfalls:
Sometimes candidates see cataract or trachoma and think that the second half is also about the eye. However, analogies are about preserving the same pattern between the two pairs, not repeating the same organ. Another mistake is not recalling exactly what pyorrhea is and therefore ignoring it. Learning a few standard pairs such as eye–myopia, ear–otitis, teeth–pyorrhea can be very helpful in verbal reasoning exams.

Final Answer:
The disease related to teeth in the same way that myopia is related to the eye is Pyorrhea.