Question:easy
An extra row of cilia (eyelashes) arising posterior to the grey line is called?
An extra row of cilia (eyelashes) arising posterior to the grey line is called?
Show Hint
Look for the term that means an extra, accessory row of lashes behind the grey line, not merely misdirected ones.
Updated On: Jun 23, 2026
- Distichiasis
- Tylosis
- Madarosis
- Trichiasis
Show Solution
The Correct Option is A
Solution and Explanation
Definition-matching trick. The stem hands you the exact definition: an extra row of cilia posterior to the grey line. Match it to the vocabulary.
Distichiasis literally is a second, accessory row of lashes sprouting from the meibomian gland openings on the posterior lamella, behind the grey line. That is a word-for-word match, so it is the answer.
Knock out the rest by their own meanings: tylosis is thickening of the lid margin, madarosis is loss of lashes (think of it as madarosis = missing lashes), and trichiasis is normally placed lashes that turn the wrong way and rub the eye, not an extra posterior row. Only distichiasis describes a supernumerary line of cilia behind the grey line. Ref: Medscape, Distichiasis Overview.
Distichiasis literally is a second, accessory row of lashes sprouting from the meibomian gland openings on the posterior lamella, behind the grey line. That is a word-for-word match, so it is the answer.
Knock out the rest by their own meanings: tylosis is thickening of the lid margin, madarosis is loss of lashes (think of it as madarosis = missing lashes), and trichiasis is normally placed lashes that turn the wrong way and rub the eye, not an extra posterior row. Only distichiasis describes a supernumerary line of cilia behind the grey line. Ref: Medscape, Distichiasis Overview.
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