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Questions and Answers
What is the definition of total hypermetropia?
What is the definition of total hypermetropia?
Which component of manifest hypermetropia can be corrected with additional effort of accommodation?
Which component of manifest hypermetropia can be corrected with additional effort of accommodation?
What does latent hypermetropia refer to?
What does latent hypermetropia refer to?
Which statement accurately describes absolute hypermetropia?
Which statement accurately describes absolute hypermetropia?
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What primarily causes the decline of latent hypermetropia with age?
What primarily causes the decline of latent hypermetropia with age?
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Study Notes
Total Hypermetropia
- Total hypermetropia occurs after complete paralysis of accommodation, typically induced by atropine.
- The formula for total hypermetropia is TH = MH + LH, where TH is total hypermetropia, MH is manifest hypermetropia, and LH is latent hypermetropia.
Latent Hypermetropia
- Latent hypermetropia refers to the portion of hypermetropia corrected by the natural tone of the ciliary muscle.
- Strong in youth, latent hypermetropia gradually diminishes with age.
Manifest Hypermetropia
- Manifest hypermetropia is the remaining hypermetropia not corrected by the physiological tone of the ciliary muscle.
- It represents the hypermetropia present when accommodation is inactive.
- It can be calculated as total hypermetropia minus latent hypermetropia and consists of two components: facultative and absolute hypermetropia.
Facultative Hypermetropia
- Facultative hypermetropia can be corrected through an increased effort of accommodation or by straining the ciliary muscle.
Absolute Hypermetropia
- Absolute hypermetropia is the portion of hypermetropia that cannot be compensated for by any active accommodation efforts.
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Description
Explore the fundamentals of hypermetropia, including total, latent, and manifest types. This quiz covers the physiological mechanisms involved and how they change with age. Test your knowledge of these important ophthalmological concepts.
