what will happen if an eyeglasses has: a. two converging lens (explain) b. two diverging lens (explain) c. both converging and diverging lens (explain) P.S. This is not a multiple choice question thank You
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what will happen if an eyeglasses has:
a. two converging lens (explain)
b. two diverging lens (explain)
c. both converging and diverging lens (explain)
P.S. This is not a multiple choice question thank You
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Solved in 3 steps
- Madam Ojo, age 60, comes to the eye clinic for a routine eye examination. I. Describe the procedure for checking visual acuity. II. If the ophthalmic nurse records 6/60 for Madam Ojo’s visual acuity, how would you explain this visual acuity score to a first-year nursing student?A patient’s visual acuity is assessed as 20/40 in both eyesusing the Snellen chart. The nurse interprets this finding as:a. The patient can see twice as well as normal.b. The patient has double vision.c. The patient has less than normal vision.d. The patient has normal vision.JJ is a 75 yo female patient with asymptomatic open angle glaucoma with elevated IOP >25%. They have no other pertinent medical conditions. The ophthalmologist spoke with them about treatment options and they prefer to try pharmacologic therapy before laser therapy. Which TWO of the following treatment options are considered first line therapies? No partial credit. a. bimatoprost (Lumigan) b. dorzolamide (Trusopt) c. pilocarpine (Isopto Carpine) d. brimonidine (Alphagan P) e. levobunolol (Betagan)
- Match the function with the correct structure. 1. Absorbs scattered light Sclera 2. Photoreceptors of the retina responsible for Vitreous humour colour vision 3. Refracts light rays into the eye Ciliary muscles 4. Supports the eyeball with the fluid they Iris contain 5. Alters the shape of the lens to promote Cones focusing Lens 6. Protects and supports the eyeball 7. Area that contains a high density of cones Choroid 8. Photoreceptors of the retina sensitive to dim Fovea centralis light 9. Focuses the light rays on the fovea centralis Rods 10. Regulates the amount of light that enters Cornea the eyeDiseussion: What is the microexamination, why it is used and what is the difference between macro and microexamination? 2. state the purpose of the followings: Coarse adjustment knob, b. Fine adjustment knob, e. Iris diaphragm. d. Objective lens. e. Ocuiar or eye lens. Lengith, e 3. If the approximate magnification when using an objective lens with a focal Y re length of (2mm) is (800X), what is the magnification of the eye lens. 4. Calculate the focal length of the objective lens for a microscope with an approximate magnification of (1000x) and an eye lens magnification of (10x). * 5. Explain briefly the microscope work mechanism to examine a specimen prépared for microexamination.Identify the following structures and sketch them in the spaces provided: 1. Cornea 2. Anterior cavity containing aqueous humor 3. Iris 4. Pupil 5. Lens 6. Zonular fibers of the lens 7. Ciliary body a. Ciliary processes b. Ciliary muscle 8. Vitreous chamber containing vitreous body 9. Sclera 10. Choroid 11. Retina a. Macula lutea i. Fovea centralis b. Rods c. Cones 12. Optic disc 13. Optic nerve (cranial nerve II) 14. Primary visual cortex of the brain
- Many conditions affect the eyes. Hyperopia, myopia, and astigmatism are three conditions that can be corrected easily using prescription eyeglasses. Laser surgery can permanently modify the shape of the cornea. Which of the following rows identify the correct types of technologies to correct each condition? Select one: а. Нуperopia Мyopia Astigmatism 1. Concave lens 1. Convex lens 1. Corrective lens that corrects 2. Laser surgery to 2. Laser surgery to increase the uneven corneal surface make the cornea the curvature of the 2. Laser surgery to make the flatter cornea corneal curvature even b. Нуperopia Мyopia Astigmatism 1. Convex lens 1. Concave lens 1. Corrective lens that corrects 2. Laser surgery to increase 2. Laser surgery to the uneven corneal surface the curvature of the make the cornea 2. Laser surgery to make the cornea flatter corneal curvature even С. Нуperopia Мyopia Astigmatism 1. Concave lens 1. Convex lens 1. Replacing the lens 2. Laser surgery to 2. Laser surgery to…Explain the process of phototransduction and signal transmission in the retina. Be sure to include the steps associated with the formation/breakdown of Rhodopsin as well as the signal transduction process that takes place in the retina beginning in the dark. Be sure to also include where in the retina these process are taking place (i.e rods, bipolar cells or ganglion cells, outer segment, inner segment…).The indication of Instilling a sterile ophthalmic solution such as liquid tears and saline every 3-4 hours to comatose patients is to, a. To destroy microorganisms in the eye b. Restore blink reflex c. Prevent corneal drying and ulceration d. Prevent cross contamination from one eye to the other
