BIO - Week 2

Question 1

Describe the following in BIO:

• Image of fundus
• Image orientation
• Stereopsis
• FOV
• Fundus Magnification
• Lmitation

Answer 1

• real
• reversed and inverted
• yes
• 25 deg (8DD)
• 2x
• Posterior pole, equator to ora serrata (must change gaze of px) and vitreous

Question 2

List the indications for BIO (not including history)

Answer 2

• indications for DFE
• thorough ocular fundus exam
• reduced best corrected VA/VF
• known PVD, previous RD or peripheral retinal disease
• worse than 6 diopters myope
• cataract

Question 3

What personal complaints serve as an indication for BIO exam?

Answer 3

• visual disturbance, photopsia, floaters, metamorphopsia, metachromatopsia, shadows, veils, curtain of reduced vision, scotoma, VF deficit, HA, diplopia, ptosis, pupil abnormalities, trauma

Question 4

What type of general health issues are an indication for BIO exam?

Answer 4

Diabetes, Hypertension, Cancer, High Cholesterol, Lupus

Question 5

List advantages of BIO

Answer 5

• large FOV
• potential to view entire retina by changing px’s gaze
• better view through media opacities relative to direct
• does not require much px cooperation
• portable and good for patients who cannot be seated at slit lamp

Question 6

List disadvantages of BIO

Answer 6

• lower mag than fundus
• image reversed and inverted
• requires dilation (generally, unless high powered lens)
• illumination levels may be regarded more uncomfortable by the px