What measurements are needed in cataract surgery
Axial length- accurate IOL power selection
Lens thickness - accurate IOL power selection
Anterior chamber depth- assess fit of IOL and reduce post op complications
Corneal thickness - influences IOL power
Which measurements needed for glaucoma
CCT- thicker =overestimation of IOP
ACD- shallow depth= increased risk of AACG + increased IOP
Norms for CCT, ACD, LT, CC, AL
CCT- 500nm
ACD- 3.3 to 3.6 mm
LT- 3.5-4mm (thicker with presbyopes and sclerotic cataract)
CC- 43-44D (7.70 -7.90mm)
AL- 22-26mm
A- scan ads and disads
B scan uses, ads and disads
UBM uses, ads and disads
Scheimpflug imaging principle, ads and disads
** image plane rotated in order with Scheimpflug principle to create clear image plane
What do thicker or thinner corneas mean?
Shallow or deep ACD
Last changed12 days ago
