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ABO study guide Questions and Answers Graded A.
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ABO study guide Questions and Answers Graded A.
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ABO study guide Questions andAnswers Graded A
Eyelids /- /correct /Answers /✔✔ /-protect /the /eye /from /foreign /bodies /and /excessive /light /
average /blink /rate /is /7 /to /12 /times /per /minutes
lids /spread /tears /over /the /corneal /surface /to /create /a /smooth /surface
they /also /wash /away /dirt /and /debris, /protects /against /diseases
palpernral /fissure /- /correct /Answers /✔✔ /-averages /15mm /high /by /30mm /wide
extra-ocular /muscles /- /correct /Answers /✔✔ /-medial /rectus- /towards /the /nose
lateral /rectus- /away /from /the /nose
superior /rectus- /upward
inferior /rectus- /downward
superior /oblique- /top /of /the /eye /toward /the /nose
inferior /oblique-top /of /the /eye /away /from /the /nose
cornea /- /correct /Answers /✔✔ /-clear /outer /portion /of /the /eye
light /rays /pass /through /the /cornea
transparent /with /no /blood /supply /of /its /own, /tears /supply /the /nutrients /
refractive /power /of /60D /cornea /provides /2/3 /refractive /power /crystalline /lens /provides /1/3
average /horizontal /diameter /of /11.7mm
vertical /diameter /of /10.6 /mm
Iris /- /correct /Answers /✔✔ /-the /colored /part /of /the /eye
,controls /the /light /inside /the /eye
color /come /from /melanin
can /allow /more /light /when /its /dim
/VID /visible /iris /diameter /HVID /horizontal /visible /iris /diameter
pupil /- /correct /Answers /✔✔ /-center /of /the /iris
crystalline /lens
responsible /for /1/3 /of /the /eyes /refractive /power /(average /15D /to /16D)
transparent /and /has /no /blood /supply
bi-convex, /focuses /light /rays /onto /the /retina
Ciliary /Muscles /- /correct /Answers /✔✔ /-
zonular /fibers /connect /the /ciliary /muscles /to /the /crystalline /lens
muscles /change /the /shape /of /the /crystalline /lens
when
/it
/contracts
/the /zonulars /relax /it /allows /the /lens /to /thicken /increasing /the /eyes /ability /to /focus /up /close /
the /ability /of /the /eye /to /change /focus /is /called /accommodation
presbyopia /- /correct /Answers /✔✔ /-
the /loss /of /accommodation /is /called /presbyopia /(need /near /and /distance /vision)
cataracts /- /correct /Answers /✔✔ /-cloudy /opacities /in /the /crystalline /lens /
when /
a
/patient
/has
/had /
a /cataract /removed /they /can /be /aphakic /(without /a /crystalline /lens) /or /pseudophakic /(with /an /IOL
/or /intraocular /implant)
retina /- /correct /Answers /✔✔ /-captures /light /rays /and /converts /them /into /electrical /impules /
contains /125 /million /rods /that /are /responsible /for /night /vision
6 /to /7 /million /cones /responsible /for /color /and /light /vision
, the /macula /- /correct /Answers /✔✔ /-
is /found /at /the /center /of /the /retina /and /allows /us /to /see /fine /details
the /fovea /- /correct /Answers /✔✔ /-only /contains /cones /and /is /responsible /for /the /sharpest /vision
macular /degeneration /- /correct /Answers /✔✔ /-results /in /vision /loss /in /straight /ahead /gaze
optic /nerve /- /correct /Answers /✔✔ /-the /optic /nerve /carries /images /from /the /retina /to /the /brain /
the /optic /nerve /creates /a /blind /spot /
a /healthy /optic /nerve /is /necessary /for /healthy /vision
Spectacle /RX /(OD, /OS, /OU) /- /correct /Answers /✔✔ /-
OD- /oculus /dexter, /OS- /oculus /sinister, /OU- /oculus /uterque /
minus /means /myopia,plus /means /hyperpobia, /plano /indicates /no /rx
quarter /steps /are /common, /but /they /can /be /broken /down /into /eighths /
OD's /put /a /minus /cylinder /and /MD's /put /a /plus /cylinder /
the /axis /is /from /0 /to /180 /and /provides /info /on /where /the /lens /powers /are /located /
prism /is /prescribed /for /patients /whose /eyes /need /help /working /together
ft28 /- /correct /Answers /✔✔ /-flat /top /28 /bifocal
tri- /trifocal /- /correct /Answers /✔✔ /-power /is /usually /50% /of /the /add
PD /- /correct /Answers /✔✔ /-
pupilary /distance /is /noted /in /mm, /places /optical /centers, /add /powers /need /a /near /pd
lens /power /- /correct /Answers /✔✔ /-
the /power /of /a /lens /is /determined /by /adding /the /front /curve /to /the /back /curve
f1 /+ /f2 /= /F /total /
the /axis /always /coincides /with /sphere /power
cylinder /power /is /the /difference /between /the /two
transcribing /the /rx /- /correct /Answers /✔✔ /-
when
/the
/signs
/of
/the /sphere /and /the /cylinder /power /are /the /same, /add /them /together /and /keep /the /same /sign /
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