few of the biometric measures for cataract by our team how can we perform biometry different methods for biometry as an optometrist

1. GROUP-A
Anuja Dhakal
Grishma Dahal
Monika Mandal
Rachana kafle
BOVS, 1st year
NEH,NAMS
BIOMETRY FOR
CATARACT

2. INTRODUCTION
Biometry OF Eye is the process of
measuring the various dimensions of
the eye, its components and their
interrelationships, and using this data
to determine the ideal intraocular lens
power.
Essentially consists of a keratometric
reading together with an ultrasonic
measurement of axial length of eye.

3. What is cataract?
 Cataract generally means opacification of
lens.

4. Why Cataract biometry?
 To measure the intra ocular lens power
before cataract extraction surgery.
 Done by the Zeiss IOL Master device that
uses a laser beam to measure the eye
structures and calculate the needed IOL for
each patient very accurately .
 Also the A-scan Biometry is available which
may be needed in some cases.

5. Measurement of axial
lenses
Advances in
cataract surgery
 A-Scan
 IOL Master
 Phaecoemulsification
 Aqualase
 IOLs

7. The term originated from phaco- (Greek phako-,
comb. form of phakós, lentil; see lens)
+ emulsification.
 Phacoemulsification is a modern cataract
surgery in which the eye's
internal lens is emulsified with
an ultrasonic handpiece and aspirated from
the eye. Aspirated fluids are replaced with
irrigation of balanced salt solution to
maintain the anterior chamber.

10.  AquaLase is a new technology that offers
significant advantages and is likely to find
wider application as clinical experience
accumulates.

13. Extracapsular surgery
 Extracapsular surgery. Your doctor
makes a longer incision on the side of the
cornea and removes the cloudy core of the
lens in one piece. The rest of the lens is
removed by suction.
 Prior to cataract surgery, antibiotic eye
drops may be prescribed to prevent
infection.

14. FEMTOSECOND LASER
 The Femtosecond laser is another option
available for doctor to use during cataract
surgery.
 It is a computer-guided laser.
 This device can aid the surgeon in the
performance of some of the steps involved
in the removal of a cataract. It can also be
used in procedures performed to correct
astigmatism