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Questions and Answers
What is the primary function of Sodium Hyaluronate in multipurpose contact lens solutions?
Which contact lens has the highest water content among the monthly spheres listed?
Which contact lens option is designed for astigmatism and has a UV blocker?
What is a recommended soak time for contact lenses using multipurpose solutions to ensure disinfection?
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Which ingredient in multipurpose contact lens solutions acts as a disinfectant and preservative?
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Which of the following monthly multifocal contact lenses has a UV blocker?
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What is the Dk/t value of the Avaira Vitality contact lens?
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Which of the following statements about the Air Optix N&D lens is correct?
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Which ingredient in contact lens solutions helps maintain a similar tonicity to tear film?
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What modality does the Acuvue Oasys lens fall under?
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What is the primary cause of dry eyes associated with Meibomian Gland Dysfunction?
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Which treatment modality is commonly used for both evaporative dry eye and aqueous deficiency dry eye?
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What is one of the recommended practices for maintaining lid hygiene?
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Which environment modification can help alleviate symptoms of evaporative dry eye?
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What pattern is typically seen in the tear film of patients with aqueous deficiency dry eye?
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What effect do medications like antihistamines have on the eyes?
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Which of the following treatments is specifically used to replace tears in patients with dry eyes?
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Which of these factors can predispose individuals to evaporative dry eye?
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Which of the following is NOT a recommended treatment for dry eye syndrome?
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What is the primary pre-disposing factor for evaporative dry eye?
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Which practice is essential for maintaining lid hygiene?
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In the management of meibomian gland dysfunction (MGD), what is a characteristic benefit of using low water content lenses?
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What is one cause of aqueous deficiency dry eye?
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What type of appearance on the tear film is indicative of aqueous deficiency dry eye?
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Which of the following is a potential consequence for patients with dry eye syndrome who continue lens wear?
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What is the waste product called that accumulates between the RPE and Bruch’s membrane in dry age-related macular degeneration (AMD)?
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Study Notes
Lid Wipes and Lubricants
- Lid wipes often contain tea-tree oil which effectively eliminates Demodex mites.
- Lubricants are utilized to replace missing tears in patients with tear deficiency.
Meibomian Gland Dysfunction (MGD)
- MGD is a leading cause of dry eye conditions.
- Heated eye masks and lid massages help liquefy oils and push them out of meibomian glands.
- Lid hygiene involves warm flannel compresses for three minutes followed by lid massage to express oils.
Tear Film Assessment
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Evaporative Dry Eye:
- Pre-disposing factors include wind, air conditioning, and activities that reduce blink rate (e.g., reading).
- Causes include lid diseases like blepharitis and thyroid eye disease.
- Treatment options comprise local environmental modifications, lid hygiene, and Omega 3 supplementation.
- Characterized by a streaky pattern on the tear film.
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Aqueous Deficiency Dry Eye:
- Pre-disposing factors consist of medications (e.g., antihistamines, beta-blockers).
- Causes include inflammation of lacrimal glands and Sjogren’s syndrome.
- Treatments include lubricants, Omega 3, and punctal plugs.
- Depicted by a circular pattern on the tear film.
Dry Age-related Macular Degeneration (AMD)
- Results from dysregulation in retinal processes leading to accumulation of waste products called drusen between the retinal pigment epithelium (RPE) and Bruch’s membrane.
Contact Lens Soft Descriptions
- Monthly lenses vary by water content, oxygen permeability (Dk/t), and features like UV protection.
- Examples include:
- Clariti Elite: 56% water, Dk/t 86, UV protection.
- Biofinity: 48% water, Dk/t 160, no UV protection, extends wear.
- Air Optix N&D: 24% water, Dk/t 175, no UV protection.
- Acuvue Oasys: 38% water, Dk/t 147, UV protection, bi-weekly wear.
Contact Lens Solutions
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Typical multipurpose contact lens solutions include:
- Polyhexanide: Disinfectant and preservative.
- Sodium Hyaluronate: Moisture retention and lubrication.
- Sodium Chloride: Adjusts tonicity to match tear film.
- Sodium Phosphate: Balances solution pH for comfort.
- Poloxamer: Acts as a surfactant and cleaning agent.
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Proper cleaning involves rubbing and rinsing lenses for 15-20 seconds; soaking time of at least 4 hours is necessary for effective disinfection.
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Description
This quiz focuses on the understanding of Meibomian Gland Dysfunction, a major cause of dry eyes. It covers treatment options such as lid wipes, lubricants, and techniques like heated eye masks and lid hygiene practices. Test your knowledge on how these methods help manage dry eye symptoms.
