Astigmatism - Lecture Note - Edubirdie

University:
Camosun College
Course:
NURS132 | Promoting Health and Wellbeing
Academic year:

2023
Views:

395

Pages:

4
Author:

Aysha A

ASTIGMATISM Different refractary power in both principal mericlian/aris of eye Regular when booth PM are at 90° to each other. Irregular. when both pm an nat at 90° to each otan. with the rule Against they rule alliques Vertical meridian a more * Horizontal meridian s more * when both PM are at 90° to each other buit nat vertical & norizontal We usually say that the vertical & horizontal power of the eye care same. Out in astigmatism 'n front of retima New vertical кишание Horizontal uwcature, rays on retina Riagrams re reen in Marnow now Refractive types of Regulan Ardigmatiom simple myopic Astigmation simple Hypermetrafic Astigmatiom combound myopic" (mart common) compound cypermetrafic Mixed Symptoms Asthenofia running together of letters appears to pasient High arrig matiem Tilting of Head to make the axis right sper-spherical - eiglincler. Treatment spectacles: CYLINDRICAL concale Pronuex (vard on refractive type of artigmatim) surgery af astigmatic CASIK b) CRI-Cimbal relaxing incisions. Ruiz frocedure-foort kerato artig oneat maniflame) Caglu coneal contact lenus [TORIC) HOW TO READ A SPECTACCE PRESCRIPTION - I myopia. 0 +0.750/whh JHMT -1.050/eye @ 90° I simple myopic minu astigmatiom A gaime the rule Mangala Mixed ASTIGMATISM Rules • eyli & spher of opporto sign eye poen > spherical power. -30 sph / +10 nyl @ 90° Nat mixed astigmation. as in this case we wls SIMPLE TRANSPOSITION New spemical = cold s + old cyli -3+1 =F201 New cylinder opficevite of old myl 101 New Axis 90 10 old ald axlu 180 e - Daph/:10. ayle @ 1809 -20 Hangala CCMA WTRI

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