Experience learning - lessons from 25 years of ATACC - Mark Forrest and Halde...
Visual Symptomology from Optometrist Point of View
1. PREPARED BY:
ANIS SUZANNA BINTI MOHAMAD A123369
CHONG TENG CHOU A122615 SIAH SOO
KIONG A122506 OOI TING SHAN
A122573 PATRICIA LOW
A122679 NUR SYUHADA BT ALWI
A123526
Visual symptomology
2. Visual symptoms
1. Blurred Vision
2. Double vision
3. Vision loss
4. Photopsia
5. Hallucination
6. Floater
7. Colored halos around eye
8. Photophobia
9. Dazzling or glare
discomfort
10. Chromatopsia
11. Heightened color
perception
12. Nyctalopia(night
blindeness)
13. Hemeralopia (day
blindness)
14. Oscillopsia
15. Color blindness
16. Palinopsia
17. Visual agnosia
18. Ocular lateropulsion
19. Pain in and about eye
20. Headache
3. 1.Blurred vision
Loss of visual acuity with indistinct
detail.
Can be unilateral or bilateral.
Can be blur at near, blur at distance or
both
Magnitude of a patient’s complaint will
depend on many factors including
- the degree of defect
- type of visual task being undertaken
May result from eye injury, refractive
error, eye disease, improperly fitted
contact lens or use of certain drug.
Normal
Vision with
diabetic
retinopathy
4. History taking part
How long he has had the visual blurring.
Does it occur only at certain times?
Ask about associated signs and symptoms, such as pain or
discharge.
If visual blurring followed injury, obtain details of the
accident
Ask if vision was impaired immediately after the injury.
Obtain a medical and drug history.
6. 2.Double vision
Diplopia
Mostly seen in binocular
anomaly
Can be unilateral or
bilateral
General cause is from
cornea, crystalline lens,
muscle, nerve and brain.
Double vision is not
normal and should be
reported promptly.
7. Etiology
Cornea
Infections of the
cornea(herpes zoster or
shingles)
Uncommon complication
of LASIK surgery.
Crystalline len
Cataract
Muscle
Myasthenia gravis
Graves’ disease
Nerve
Multiple sclerosis
Guillain-Barre syndrome
Uncontrolled diabetes
Brain
Strokes
Aneuryms
Brain tumour
Increased pressure inside
the brain from trauma,
bleeding or infection
8. 3.Vision loss
Inability to perceive visual
stimuli
Can be sudden or gradual
and transient or
permanent
Range from slight
impairment to total
blindness
Age-related
Macular
degeneration
Normal
Vision
Glaucoma
Hemiapnosia
9. Etiology of sudden vision loss
always a medical
emergency
Eye injury
Eye artery obstruction -
this cause and other
causes are a medical
emergency.
Retinal artery obstruction
Retinal vein obstruction
Eye blood vessel
thrombosis
Temporal arteritis
Retinal detachment
Amaurosis fugax
Stroke
TIA (Transient ischemic
attack)
Migraine
Optic neuritis
Vitreous hemorrhage
Acute glaucoma
Methyl alcohol poisoning
Hysteria
Brain injury
Blow to the head
10. Etiology of gradual vision loss
Cataract
Macular degeneration
Age-related macular
degeneration
Diabetic retinopathy
Glaucoma
Hypertension
Choroiditis
Retinitis pigmentosa
Trachoma
Field of Vision Loss in
Late Retinitis Pigmentosa
Loss of vision associated
with macular
degeneration
11. 4.Photopsia
Hallucinatory
perceptions such as
sparks, lights or colours
arising in the absence of
light stimuli and
observed when the eyes
are closed.
Etiology:
posterior vitreous
detachment
migraine with aura
migraine aura without
headache
retinal break or
detachment
occipital lobe infarction
sensory deprivation
12. 5.Hallucination
Definition:
Visual perception not
evoked by a light stimulus.
Perceptions in a conscious
and awake state in the
absence of external stimuli
which have qualities of real
perception, in that they are
vivid, substantial, and
located in external
objective space
13. Etiology
Blind person (central or peripheral visual field loss)
Bilateral eye covering (after surgery)
Ocular lesions as retinal haemorrhage, glaucoma,
optic atrophy
Psychoses
Central nervous system lesion (Alzheimer disease)
14. 6.Floaters
Floaters are little
"cobwebs" or specks that
float about in the field of
vision.
Dots or filaments that
move with the movement
of eye
Etiology:
Vitreous opacities
Scotomatous defects
(retinal lesion, myopia)
Corneal foreign body
reflection
Carbon tetrachloride
poisoning
Migraine
15. 7.Colored halos around lights
Blue and violet are next
to the stimulating light
and red outermost.
Etiology:
Glaucoma-
A.acute-angle closure with streching of
the corneal lamellae
B.open-angle glaucoma-halo noted in
the awakening (IOP highest in
morning)
Mucus on the cornea
Corneal scar/ edema
Krunkenberg spindle
Lens opacities
Vitreous opacities
Haze of ocular media
16. 8.Photophobia
Defination:
Painful intolerance of the
eyes to light.
symptom of a primary
ocular disorder or
underlying
central nervous system
disorder
Etiology
Aniridia
ocular
(conjuctivitis,keratitis,
iritis)
Albinism
Total color
blindness(achromaptosia)
Systemic disease
Toxic cause
Drug induced (digitoxin)
17. 9.Dazzling or glare discomfort
Definition:
difficulty seeing in the presence of bright light such as
direct or reflected sunlight or artificial light such as
car headlamps at night.
Patient with glare
discomfort
Normal patient without
glare discomfort
18. Etiology
1. Altered pupillary
response
2. Asymmetric placement
of the IOL in relation to
the pupillary aperture
3. Corneal scars or foreign
bodies
4. Idiopathic
5. Drugs such as
chloroquine,acetazolam
ide, or trimethadione
(Tridone)
6. Emotional disorders
7. Following refractive
surgery
8. Lenticular changes
19. Definition: Etiology:
Abnormal condition in
which objects appear
falsely coloured.
It named depending
upon the colour seen.
1. Cone monochromatism
• Blue cone
monochromatism -
abnormal vision of
blue color
1. Drugs
2. Genetic
3. Macular degeneration
4. Optic neuritis
5. Retinitis pigmentosa
10.Chromatopsia
24. 12.Nyctalopia (Night Blindness)
Definition:
a condition making it
difficult or impossible to
see in relatively low light.
It is a symptom of several
eye diseases
Difficulty sees in darkness
25. Etiology
Vitamin A deficiency
retinitis pigmentosa
congenital night
blindness
Sorsby's fundus
dystrophy
pathological myopia
peripheral cortical
cataract
Oguchi disease
refractive surgery (RK,
PRK, LASIK)
26. 13.Hemeralopia
Definition:
Day blindness
inability to see as distinctly in
a bright light as in dim one
It can be described as
insufficient adaptation to
bright light.
The retinas of those with day
blindness are unable to
process the light around them.
This, in turn, intensifies the
sunlight so much that they
literally can't see anything
around them.
28. 14.Oscillopsia
Defination:
A visual disturbance in
which objects in
the visual field appear
to oscillate.
The severity of the
effect may range from
a mild blurring to
rapid and periodic
jumping.
29. Etiology :
loss of the vestibulo-
ocular reflex
involuntary eye
movements such
as nystagmus
impaired coordination in
the visual
cortex (especially due
to toxins)
aminoglycoside
Illusionary movement of enviroment
unilateral
bilatarel
30. 15.Color blindness
Definition:
A.k.a color
vision deficiency
the inability to
perceive differences
between some of
the colors that
others can
distinguish.
31. Color blindness
Deficiency in color vision can be due to:
Inherited
defects
- present from birth and
have genetic basis
- affect both eyes equally
- affect the entire visual
field
Acquired defects
-secondary to a
pathological state
-may affect one eye
-may affect part of the
visual field
34. 16. Palinopsia
Visual disturbance that causes images to persist to some
extent even after their corresponding stimulus has left
These images are known as afterimages and occur in
persons with normal vision.
A person with palinopsia experiences them to a
significantly greater degree, to the point where they
become difficult or impossible to ignore
37. 17.Visual agnosia
Visual agnosia is a neurological disorder
distinguished by the inability to recognize
familiar objects.
Types :
1)Appreceptive Agnosia
2)associative visual agnosia
38. Appreceptive Agnosia - Failure in high-level object
recognition despite normal vision
Symptoms :
Pt are unable to recognize objects
Unable to access the structure or spatial properties of a visual
stimuli
Object is not seen as a whole.
Cannot draw or copy things
Causes :
damage in the lateral occipital area
40. Associative visual agnosia
inability to identify objects due to impaired
access to stored semantic information about the
objects.
Causes :
lesion on the left occipital and temporal lobe,
often in conjunction with damage to the
posterior thalamus and limbic cortex.
41. Criteria :
Difficulty recognizing variety of visually presented
objects with their semantic meaning, or organize
objects into semantic categories.
Normal recognition of objects from a verbal description
of it or when using sense other than vision (e.g. smell,
touch, taste).
Elementary visual perception that is sufficient to copy
line drawings quite well but unable to identify objects
being copied
42. • copy line drawings quite well
• unable to identify objects being copied
43. 18.Ocular Lateropulsion
A strong forced conjugate deviation of the eyes to one
side.
a position bias of eye movements in the direction towards
the lesion
Symptoms :
Unable to reach a laterally placed fixation target in a single
rapid eye movement (a single saccade)
Patients overshoot towards the side of the lesion and undershoot in
opposite direction.
Cause :
Asymmetrical lesion of the pons and lateral medullar
44.
45. 19.Pain In and About Eye
Symptoms
burning, throbbing, aching, or stabbing sensation in or around the eye.
feel as if there is a foreign body in the eye.
Causes
Burns
Conjunctivitis (pink eye) or any inflammation of the upper and lower lids
Contact lens complications
Eye problems (infection, irritation, or injury such as a corneal abrasion)
Eye surgery
Glaucoma
Migraine headache
Sinus problems
Stye (hordeolum)
Viral infections such as the flu
46. 20.Headache
Headaches often appear centered
around the eyes or behind the eyes.
Symptoms :
referred area of the pain is around
the
eyes.
a brow ache or an ache behind the
eyes.
47. Causes :
• Eyestrain - overworking of the focusing muscle within
the eye.
• Contact lens related problems - headache may come
from a poorly fitting, tight lens, corneal infection or
swelling, or from a lack of oxygen in the cornea.
• Corneal ulcer
• Conjunctivitis
• Dacryocystitis - an infected tear drainage sac (inside
corner of the eye) can lead to pain and headache
• Glaucoma (acute)
• Optic neuritis - inflammation of the optic nerve can
cause headache and pain on eye movement along with
blurred vision
Infections of the cornea(herpes zoster or shingles)can distort the cornea.
Uncommon complication of LASIK surgery can leave one cornea altered, creating unequal visual images.
Myasthenia gravis is an autoimmune illness that blocks the stimulation of muscles by nerves inside the head. The earliest signs are often double vision and drooping eyelids, or ptosis.
Graves' disease is a thyroid condition that weakens the muscles of the eyes. Graves' disease commonly causes vertical diplopia. With vertical diplopia, one image is on top of the other.
Nerve problems. Several different conditions can damage the nerves and lead to double vision:
Multiple sclerosis can affect nerves anywhere in the brain or spinal cord. If the nerves controlling the eyes are damaged, double vision can result.
Guillain-Barre syndrome is a nerve condition that causes progressive weakness. Sometimes, the first symptoms occur in the eyes and cause double vision.
Uncontrolled diabetes can lead to nerve damage in one of the eyes, causing eye weakness and double vision.
Brain problems. The nerves controlling the eyes connect directly to the brain. Further visual processing takes place inside the brain. Many different causes for double vision originate in the brain. They include:
Strokes
Aneurysms
Increased pressure inside the brain from trauma, bleeding, or infection
Brain tumors
Migraine headaches
the inability to perceive visual stimuli — can be sudden or gradual and temporary or permanent. The deficit can range from a slight impairment of vision to total blindness.
Palinopsia is thus a condition which mimics normal phenomena, but with far greater intensity
An example of the image, if you place your hand in a field of vision, and move it from left to right and you will see the trails
Patients who complain of Visual Snow literally see what resembles "television snow," that is, specs or particles that blink on and off in their vision.
Pt with associative agnosia are able to perform basic tasks better than appreceptive agnosia patients
Semantic the meaning