Opthalmoscopy Structures

Question 1

Pupil and Crystalline Lens

Answer 1

• Either a +7/+8D lens you can view pupils from a distance of 4 to 6cm from px
• Look for anything thsat interferes with light returning from retina such as floaters (in vitreous), cataracts (in crystalline lens), corneal distortions or scars etc

Question 2

Vitreous

Answer 2

• Slowly reduce plus power and work your way back through vitreous examining it for slight changes
• Vitreous floaters are best seen with +6/+7D lens in place
• With retro illumination clearly in focus, ask the px to look v quickly to left, right and then back to a fixation point.
• Floaters will be seen to swirl across as dark cobwebs or filaments within retinal glow
• better for you to ask px if floaters bother them than for px to ask if you noticed them