which of the following is not important to document in medical records for contact lens patients? - location at which the patient was originally taught insertion and removal which of the following will not increase the movement of a tight fitting rigid gas permeable lens? - enlarge the posterior optic zone After building up her wearing time, Jennifer returned for an afternoon recheck after eight hours of lens wear. The lenses moved <0.5 mm and her complaints were minimal except fo...

annular bifocal contact - A lens with distance portion ground into the center of the lens and the near portion ground into the periphery aphakic lenses - lenses designed for post-cataract fitting apical zone of cornea - the central portion of the cornea with a constant radius of curvature. Also called the corneal cap. artificial tears - medications, many of them over the counter, to treat dry eyes aspheric lens - A non-spherical lens, in which the radii of curvature increase towards th...

base curve - refers to the radius of curvature of the central posterior surface of the lens. It may be expressed in diopters of surface power (D) or in millimeters (mm) of radius or curvature. optical zone - the chord diameter over which the base curve extends on the posterior surface of the contact lens, described in millimeters secondary or intermediate curves - lies between the base curve and the peripheral curve on the posterior lens surface, usually 0.70mm to 1.50mm flatter than t...

What is the mucous membrane that covers the sclera and lines the inside of the eyelids? - Conjunctiva Which refractive error is commonly referred to as "far-sighted"? - Hyperopia Which of the following refractive errors results in light coming to a point of focus in front of the retina? - Hyperopia Which of the following refractive conditions refers to the age-related, gradual loss of accommodation? - Presbyopia Which refractive error is commonly referred to as "near-sighted"? - M...

Which of the following medications may affect successful contact lens wear? a. antacids b. antihistamines c. aspirin d. laxatives - antihistamines Which term refers to a sensitivity to light A.presbyopia B.Photophobia C.Pannus D. Ptosis - Photophobia The following is an example of what type of astigmatism? K's 42.50 @180 /40.50 @90 A. with the rule B. Lenticular astigmatism C.Against the rule D. Irregular astigmatism - Against the rule astigmatism The cornea receives nutrients...

The first successful contact lenses which were originally molded to conform to the shape of the cornea were known as - Scleral/Haptic lenses Corneal contact lenses: - are the most common design for rigid and gas permeable lenses. The majority of soft lenses fit today are: - semi-scleral A liquid coming in contact with a hydrophilic lens material with a relatively small wetting angle would be likely to: - spread evenly over its surface A contact lens with diameter larger than that of th...

Which medication may affect successful contact lens wear? - Antihistamines Antihistamines are beneficial when treating allergies and cold symptoms because they dry out the mucous membranes of the nasal passage. However, this may also lead to dehydration of the tear film. Antihistamines have also been known to slow down the blink rate and increase corneal sensitivity. What is the term that refers to a sensitivity to light? - Photophobia What is the condition called when a patient can n...

Steep Fluorescein Pattern - Bright green pooling center, very faint green pooling on diameter of lens Flat Fluorescein Pattern - Bright green pooling on diameter of lens, very faint green in center Against-the-rule Astigmatism Pattern - Bright green pooling horizontally, faint green pooling vertically With-the-rule Astigmatism Pattern - Bright green pooling vertically, faint green pooling horizontally Prism Ballast - Common technique to stabilize lens from rotating. Added thickness ...

optic zone - the central portion of a contact lens which contains the refractive power and generally corresponds to the central corneal cap posterior apecal radius - this term is generally used in reference to spin-cast soft lenses. the curvature of the posterior surface of the lens changes with the refractive power. the radius of curvature is measured at the apex of the posterior surface. steeper base curve - occurs when the posterior radius of curvature is decreased (i.e. 8.4 to 8.1 ...

Assessment of the quality of the peripheral curves (blends of a rigid contact lens) is achieved by the use of thea. profile analyzer b. shadow graph c. keratometer d. burton light - a. profile analyzer Contact lens power should be specified ina. back vertex power b. sphero-cylinder power c. power in situ d. posterier apical radius - a. back vertex power The slit-lamp illumination that gives an overall view of the cornea but limits detail isa. sclerotic scatter b. diffuse c. ...