Bifocals - Study guides, Class notes & Summaries

NAO VOLUME 3 QUESTIONS AND ANSWERS | LATEST VERSION | 2024/2025 | RATED A+ What is the main purpose of an optical prescription? An optical prescription is a written order specifying the refractive power of lenses needed to correct a patient's vision. What does "OD" mean on a prescription? OD stands for "oculus dexter," which is the Latin term for the right eye. How is "astigmatism" corrected in lenses? Astigmatism is corrected by using cylindrical lenses tha...

VCP Exam Questions & Answers 2024/2025 T or F: Len's eliminate the existing disorder of the eye. - ANSWERSFalse!! They compensatory What lenses do you use for myopia? - ANSWERSMinus concave lenses What lenses do you use for hyperopia? - ANSWERSPlus convex lenses What lenses do you use for astigmatism? - ANSWERSCylindrical lenses What lenses do you use for presbyopia? - ANSWERSPlus convex lenses What lenses do you use for accommodative problems? - ANSWERSPlus lenses during ne...

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...

ABO Exam Knowledge Check with verified solutions | Latest 2023/2024 Change a bifocal Rx to a single vision Rx ️ Add the bifocal power to the sphere powers. OD: -0.50 OS: -0.25-0.25x172 Add: +1.75 Turns intoOD: +1.25 OS: +1.50-0.25x172 Anisometropia ️ There is a difference of 3 diopters between both eyes; when the vision of the eyes differs by a large margin. Antimetropia ️ Refers to Rx's that differ in sign. Ex. OD: +0.25 OS: -0.75 Simple Hyperopia ️ The Rx will be a + sphe...

Change a bifocal Rx to a single vision Rx - ANSWER-Add the bifocal power to the sphere powers. OD: -0.50 OS: -0.25-0.25x172 Add: +1.75 Turns into- OD: +1.25 OS: +1.50-0.25x172 Anisometropia - ANSWER-There is a difference of 3 diopters between both eyes; when the vision of the eyes differs by a large margin. Antimetropia - ANSWER-Refers to Rx's that differ in sign. Ex. OD: +0.25 OS: -0.75 Simple Hyperopia - ANSWER-The Rx will be a + sphere Simple Myopia - ANSWER-The Rx will...

What are sensory changes found in Middle Adulthood? Age related vision problems (presbyopia, myopia) Hearing loss (presbycusis) The decrease in sensitivity to taste and smell Strength and coordination decline The decrease in basal metabolism - loss of endurance Manual dexterity becomes less efficient Complex response time may increase Many of these changes are tempered by knowledge related to the experience What are sensory changes often found in Older Adulthood? Sensory changes - vision, smell...

A client dx with a cataract comes into the clinic. What assessments should the nurse observe in this client? - CORRECT ANSWER-blurred or cloudy visual image a colleague has been splashed in the eye with cleaning solution. Which of the following would be the priority? - CORRECT ANSWER-irrigating the eye immediately with tap water the nurse is teaching the client to instill eye drops. Which statement is correct? - CORRECT ANSWER-"wash your hands before and after instilling eye drops and ...

Change a bifocal Rx to a single vision Rx - Add the bifocal power to the sphere powers. OD: -0.50 OS: -0.25-0.25x172 Add: +1.75 Turns intoOD: +1.25 OS: +1.50-0.25x172 Anisometropia - There is a difference of 3 diopters between both eyes; when the vision of the eyes differs by a large margin. Antimetropia - Refers to Rx's that differ in sign. Ex. OD: +0.25 OS: -0.75 Simple Hyperopia - The Rx will be a + sphere Simple Myopia - The Rx will be - sphere Marcus Gunn - Tests to see if bot...

Which tint color most strongly absorbs blue light - Yellow Looking below center of a minus lens results in base __ prism - Down A -6.50 lens decentered 2 mm results and how much prism - 1.3 A lens front surface curve is +4.25 and the back surface curve is -7.00 -.50 X 65. What is the lens power? - -2.75 - 0.50 X 65 A lens with a focal length of .5 meters has a power of - 2D A patient with a PD of 65 chooses a 54-18 frame. What will the decentration be in each eye - 3.5mm in A right eye o...

Change a bifocal Rx to a single vision Rx - CORRECT ANS Add the bifocal power to the sphere powers. OD: -0.50 OS: -0.25-0.25x172 Add: +1.75 Turns intoOD: +1.25 OS: +1.50-0.25x172 Anisometropia - CORRECT ANS There is a difference of 3 diopters between both eyes; when the vision of the eyes differs by a large margin. Antimetropia - CORRECT ANS Refers to Rx's that differ in sign. Ex. OD: +0.25 OS: -0.75 Simple Hyperopia - CORRECT ANS The Rx will be a + sphere Simple Myopia - CORRECT A...