Which of the following examinations is the most important in the diabetic retinopathy? Please choose the best?

Question by tinku: Which of the following examinations is the most important in the diabetic retinopathy? Please choose the best?
Which of the following examinations is the most important in the diabetic retinopathy? Please choose the best answer from the four choices
a. ophthalmoscope 
[...]

Which of the following examinations is the most important in the diabetic retinopathy? Please choose the best?

Which of the following examinations is the most important in the diabetic retinopathy? Please choose the best answer from the four choices
a. ophthalmoscope 
b. slit-lamp 
c. biconvex lens 
[...]