eye assessment
Objectives:
students will be able to:
1. Demonstrate the ability to safely &
accurately complete a comprehensive
examination of the eye.
2. Demonstrate the ability to accurately
document eye assessment data in organized manner.
Equipment Needed
1 . Snellen Chart
2. Near-vision chart
3. Cover card
4. Penlight
5. Opthalmoscope
6. Ruler
Guidelines for using the ophthalmoscope:
1.Red numbers indicate anegative diopter & areused for
near sighted clients.
2.Black numbers indicate apositive diopter & areused for farsighted clients.
3. The zerolensis usedif neitherthe examiner northeclient hasa refractive error.
4. Turn ophthalmoscope on & select the aperture with the largebround beam of white light.
5. Ask the client to remove glasses ,remove your glasses.
Contactlenses canbe left intheeyes ofthe client ortheexaminer.
6.Ask the client to fixgazeonan object thatis straight ahead & slightly upward
7.Darken theroomto allow pupils to dilate.
8.Hold the ophthalmoscope inyour right hand with your index finger onthelens wheel & place the instrument to
your right eye.Examinethe client'sright eye. use your left hand&left eye to examinethe client's left eye.
9.Begin about 10-15 inches from the client at a15degree angel to the client's side.
10. Keep focuses on the redreflex as you move incloser,then rotate the diopter setting to see the opticdisc
Subjectivedata:—
1. Vision difficulty(decrease acuity)
2.Redness ,swelling
3. Glaucoma (blurring, blindspots)
4. Pain
5,Watering, discharge
6. useof glassesor contact lenses
7. Strabismus, diplpia
8. Past history of ocular problems
9. Self-care behaviors
External Eye Structures:
Eye brow for shape,movement , hair distribution :normal finding revealed symmetrical in shape intact skin and evenly hair distribution ,symmetrical movement
Eye lashes: evenlyhair distribution,curl directed outward
Eye lids: inspect for color,lesion and movement :color same as the face nodiscoloration,free of lesion and discharge when lids closedit should be
symmetrical complete ,sclera not visible
Assess bulbar conjunctiva( cover the eye
ball andsclera : transparent ,sclera white
or yellowin skinny person.
capillary appears free oflesion (retract)
Assess palpebral conjunctiva line the eye
lideverting the eyelid normal finding pink
tored,shiny smooth free of discharge and
lesion By using gauze or cotton touch the client cornea blinking indicate that the trigeminal (5th) nerve is intact
Inspect pupil :
black in color , equal in size
black in color , equal in size
normally 3-7mm in diameter and round ,iris flat and rounded
Assess pupil for :
Direct reaction to light: pupil constrict ( penlight)
Reaction to Accommodation :Penlight placed 10cm or 4 in near nose bridge ,normal finding pupil constrict when looking on near object and dilated on far object.
Direct reaction to light: pupil constrict ( penlight)
Reaction to Accommodation :Penlight placed 10cm or 4 in near nose bridge ,normal finding pupil constrict when looking on near object and dilated on far object.
Documentation : PERRLA (pupils equal round reacting to light and accommodation
Assess Lacrimal Gland Sac and Nasolacrimal duct
Inspect and us index to palpate :Free of edema ,no tenderness ,no excessive
tearing Lacrimal gland in outer eye canthus
Lacrimal sac and duct inner canthus of eye
Exteraoccular Muscle Test
Stand direct in front of the client use
penlight within 1ft distance (30 cm) ask
the client to follow the object move
toward 6 cardinal direction . Normal
finding both eye coordinated movement
Abnormal: eye fail to follow the object
squint and strabismus ( cross –eye)
Nystagmus : caused by nerve impairment
How is visual fie ld testing done?
visual field testing is performed one eye at a time, with the opposite eye completely covered to avoid errors. In all testing, the patient must look straight ahead at all times in order to avoid testing the central vision rather than the periphery.
To summarize, for numerous reasons:
* visual field testing is useful screening for glaucoma,
*testing patient with glaucoma for treatment response,
*screening and testing for lid droop or ptosis,particularly for insurance approval of lid lift surgical procedures
* Temporal can detected within 90 degree
central
* Upward detected with 50 because of
orbital ridge
* Downward detected with 70 cheek bone
* Nasal filed within 50 because of nose
Normal : client can see the object
Abnormal: small field glaucoma ,
Visual acuity:
Near vision: within 30-36cm distance ask
the client to read newspaper or magazine
with keeping glass or lenses
Distance vision test within 20 feet or 6
meter by using snellen chart the client
read the chart line from top to bottom .
First number 20 indicate the distance
Between the chart &client
Second number 20 indicate
The distance that normal
Eye can read Glass and lenses keeped
—Distance from the chart
◦D (distant) for the evaluation done at 20 feet (or 6 meters).
◦N (near) for the evaluation done at 14 incheor or 36 cm).—Eye evaluated
◦OD (Latin oculus dexter) for the right eye.
◦OS (Latin oculus sinister) for the left eye.
◦OU (Latin oculi uterque) for both eyes.
◦cc (Latin cum correctore) with correctors.
◦sc: (Latin sine correctore) without correctors
Performing functional vision test
1- light perception: shin penlight from
lateral than off ask client about light if he
recognize documentation : LP+
2- Hand movement within 30 cm 1 feet
move hand back ,front than stop ask
client when it stopped doc: H\M 1ft +
3- Counting finger within 30 cm or 1 ft ask
the client number of finger doc: F\C+
Ophthalmoscope: A lighted instrument,
one of the most important tools for
examining the optic disc . Normal orange
to pink with vessel appearance
Abnormal pale red spot