- Study guides, Class notes & Summaries

NCLE PRACTICE TEST -125 Q&A (VERIFIED ANSWERS) |ALREADY GRADED A+2024 A Correct Statement regarding epithelial cells is that they: a. Comprise the posterior layer of the cornea b. Are unable to regenerate c. Comprise the thickest layer of the cornea d. Have the ability to reproduce - correctanswer-d) have the ability to reproduce Which of the following prescriptions indicates against-the-rule astigmatism? a -4.50 +1.00 x75 b -4.50 +1.00 x 180 c -4.50 -1.00 x 165 d 4.50 -1.00 x 180 - co...

NCLE Practice Exam Questions With Verified Answers The advantages aphakia have over spectacle lenses - answerLess peripheral aberration Less magnification Increase visual field not having a lens inside your eye - answerAphakia Which of the following can aphakia cause, myopia or hypermetropia? - answerHypermetropia Causes of aphakia - answer*Congenital absence of lens *Surgical Aphakia *Absorption of lens matter *Traumatic extrusion (push or forced out) *Posterior dislocation- in vitre...

Orbicularis - Answer contraction of this muscle closes the eyelids lid margins - Answer blepharitis is the condition that affects zeis gland - Answer a hordeolum or stye is an inflammation of the palpebral fissure - Answer distance between upper and lower eyelids lower eyelid - Answer 44% of all eyelid skin cancers affect ptosis - Answer dropping of the eyelid punctum - Answer openings from which tears drain canthus - Answer juncture of the upper and ...

What is the thickest layer of the cornea? - Answer stroma Which corneal layer controls the fluid content of the cornea? - Answer endothelium What is cornea edema? - Answer excess fluid in the stroma that can swell it and lead to loss of visual acuity What kind of contact lenses must be stabilized (not rotate) on the eye for good vision? - Answer toric contact lenses Concentric vs Aspheric Multifocal Lens Design - Answer aspheric multifocal lenses have a gradual change ...

antihistamines - Answer 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, they are also been known to slow down the blink rate and increase corneal sensitivity. against-the-rule astigmatism - Answer present when the keratometer readings are steeper in the horizontal meridian (42.50) than in the vertical meridian (40.50 @ 90) aqueous humor, tears and limb...

base curve - Answer 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 - Answer the chord diameter over which the base curve extends on the posterior surface of the contact lens, described in millimeters secondary or intermediate curves - Answer lies between the base curve and the peripheral curve on the posterior lens surface, usually 0.70m...

adnexa - Answer extraocular structures of the eye which include the eyelids, the orbit, lacrimal glands anterior chamber - Answer the area bounded in front by the cornea and in the back by the lens and filled with aqueous aqueous - Answer a clear, watery solution in the anterior and posterior chambers artery - Answer the vessel supplying blood to the eye canal of schlemm - Answer the passageway for the aqueous fluid to leave the eye choroid - Answer carries blood...

The posterior optical zone will directly affect the lens to cornea relationship of a rigid gas permeable lens. If the posterior optical zone is steepened, it will increase the sagittal depth. If it is flattened, it will decrease the sagittal depth. Changing the power, which is accomplished by changing the anterior optical zone, will not affect the sagittal depth of the lens, nor will changing its edge design. - Answer 1. The sagittal depth of a rigid gas permeable contact lens can be altered ...

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

optic zone - Answer the central portion of a contact lens which contains the refractive power and generally corresponds to the central corneal cap posterior apecal radius - Answer 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 - Answer occurs when the posterior radius of curvature is d...