ophthalmology - general Flashcards

1
Q

define synechiae

A

condition when iris adheres to another structure
anterior - cornea
posterior - lens

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2
Q

triggers for synechiae

A

trauma
iritis
iridocyclitis

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3
Q

define iridocyclitis

A

inflammation of iris + ciliary body

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4
Q

Mydriasis

- define

A

Pupillary dilation

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5
Q

trachoma

  • causative pathogen
  • mechanism of disease
A

chlamydia trachomatis

chronic conjunctivitis causing scarring under eyelid and eyeball

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6
Q

define

- exotropia

A

manifest squint, with affected eye deviated temporally/ laterally

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7
Q

define

- esotropia

A

manifest squint, with affected eye deviated nasally / medially

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8
Q

define

- exophoria

A

latent squint, with affected eye deviated temporally / laterally

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9
Q

define

- esophoria

A

latent squint, with affected eye deviated nasally / medially

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10
Q

what is a manifest strabismus

A

a manifest strabismus is a strabismus that is present with both eyes open

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11
Q

what is a latent strabismus

A

a latent strabismus is a strabismus that is present when one eye is occluded

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12
Q

what is the difference between a ‘-phoria’ and a ‘-tropia’

A

‘-phoria’ refers to a latent squint; a strabismus when 1 eye is occluded
‘-tropia’ refers to a manifest squint; a strabismus when both eyes are opened

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13
Q

what is a comitant strabismus

A

a strabismus that occurs in all directions of gaze

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14
Q

what is a non-comitant strabismus

A

a strabismus that is only observed in some directions of gaze

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15
Q

what is amblyopia (layman’s, and clinical definition)

A

layman - when 1 eye has significantly reduced visual acuity than the other, despite being structurally intact

clinical - best corrected difference of 2 lines, in a structurally intact eye

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16
Q

define

- hypertropia, hyperphoria

A

hyper means an abnormal upward deviation of the eye
hypertropia - manifest abnormal upward eye deviation
hyperphoria - latent abnormal upward eye deviation

17
Q

define

- hypotropia, hypophoria

A

hypo means an abnormal downward deviation of the eye
hypotropia - manifest abnormal downward eye deviation
hypophoria - latent abnormal downward eye deviation

18
Q

define lagophthalmos

A

being unable to fully close the eyelid
etymology
- lago means hare, ophthalmos means eye
- they used to think that rabbits slept with eyes not totally closed

19
Q

ddx for lagophthalmos (4)

A

sleep (nocturnal lagophthalmos)
facial nerve palsy
eyelid scarring
exophthalmos