Question

Question 1    Which of the following areas of the eye is most commonly affected by intra ocular foreign bodies?

		cornea
		globe
		iris
		none of the above

  

Question 2    The metal compounds that are not well tolerated by the eye and tend to cause infection are:

		iron and copper
		nickel and aluminum
		stainless steel and lead
		none of the above

Question 3    All of the following are consequences of an intra ocular foreign body affecting the sclera except:

		infection
		meningitis
		blindness
		epistaxis

Question 4 When using the irrigation method of intra ocular foreign body removal the solution should be directed from the:

		superior to inferior portion of the eye
		inferior to superior portion of the eye
		medial to lateral portion of the eye
		lateral to medial portion of the eye

Question 5 When using the cotton-tipped applicator method for the removal of an intra ocular foreign body the clinician should direct the object away from the:

		cornea
		globe
		pupil
		conjunctiva

Answer 1

Question 1   

Any abnormal object or substance which does not belong to an eye is considered as a foreign body.

In industrial accidents the incidence of the foreign body in the eye very high. In general, If the foreign body is within the eyeball it is known as an intraocular foreign body (IOFB) and when the foreign body is outside the eyeball it is known as an extra-ocular foreign body (EOFB.

In the modified classification Intra ocular foreign body are any foreign objects in the in the angle of the anterior chamber, iris lens, vitreous, retina and intraorbital.

Answer:

Cornea

As the part of the eye, the dome over the iris and not covered with conjunctiva is the most affected part.

  

Question 2   :

Answer: iron and copper

Most of the metal compounds are non-irritating to the eyes, except iron and copper.

Question 3   

Answer: Epistaxis, is the condition of nose bleeding. It affects the nose.

Question 4

Answer: medial to a lateral portion of the eye,

So that the foreign body can be removed from the inner aspect to the outer aspect of the eye.

Question 5

Answer: Pupil

The foreign body has to be moved away from the pupil as any injury to pupil affects the vision.