Symptomatology - HA Flashcards
(112 cards)
Symptomatology needs
Good case history
Ocular or refractive in nature
Constant BOV
BOV AT FAR
uncorrected myopia
If px has habitual rx but still experience BOV
needs upgrade of the power
2 possible causes of BOV at Far and Near
- Presbyopia
- Astigmatism
Most likely pathological or dry eye
INTERMITTENT BOV
occurs because of dry eye patchy area on the cornea
Intermittent BOV
Twitching of lids
BLEPHAROSPASM
Weakening of levator palpebrae superioris [elevating muscle of upper eyelid]
BLEPHAROSPASM
twitching of eyelids in the afternoon
tired eyes
twitching of eyelids in the morning
possibility of bell’s palsy to occur
thyroid problems can cause
intermittent BOV
lumalapot index of refraction (aqueous & vitreous)
DIABETIC PX
mataas ang index of refraction
HYPERTENSIVE PX
towards plus ang index of refraction (hyperopia)
Anemic & Cancer pxs
Nocturnal myopia
BOV during Night
Totally blind or wala nakikita at night
Nyctalopia
Nahihirapan sa gabi
Nocturnal myopia
more damage occurs to rods & elongation of eyeball
NYCTALOPIA
Lights on/Photopic refraction and lights off /Scotopic refraction
What will be the effect?
Pag nagbago because…
Dilate- tumaas grado (wants to acc more)
Constrict- change refraction
NOCTURNAL MYOPIA
- High index refraction
- Accumulate of water (namamanas)
- Towards myopia/minus
BOV DURING PREGNANCY
Average -0.50 D increase if the patient is
pregnant
temporary blindness
- cause is gutom or pagod
- refer to neuro pero pwede i-refract muna
AMAUROSIS FUGAX
AMAUROSIS FUGAX
BOV DURING TRANSIENT LOSS OF VISION