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Subha's Ophthalmic Page
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search information related to IOL, biometry, corneal topography, etc.
Barrett A Constant to Lens Factor conversion and Design Factor
For specific A constant to Lens Factor conversion table please click on the below link : https://www.quickguide.org/post/new-a-constant-...
Subhabrata Bhattacharya
Jun 18, 2019
Table Chart conversion of Wang & Koch Nomogram for High Axial Length Patient
This table chart is as per updated Wang & Koch nomogram publised at the JCRS, vol 44, Issue 11 nov 2018 While using a two variable...
Subhabrata Bhattacharya
Jun 14, 2019
Patient Fixation with IOL Master 700 Biometry
Image on Left with poor fixation compared to image on right. @Subha's Ophthalmic Page
Subhabrata Bhattacharya
Jun 10, 2019
The Science Behind Keratometry & the concept of Keratometry index (K Index)
Recently I was involved in a discussion on different makes of Keratometers by different companies. Many of the participants voiced their...
Subhabrata Bhattacharya
Mar 20, 2019
A paradigm shift in astigmatic correction with TORIC IOLs - The concept of Total SIA by Dr Holladay
This decade has seen many new concepts cropping up with regard to the concept of astigmatic correction with TORIC IOLs. First, Douglas...
Subhabrata Bhattacharya
Mar 8, 2019
Basics of Phaco - 3
We shall now focus on Phaco Energy or the power applied to break the nucleus for removal of the quadrants easily. Longitudinal phaco...
Subhabrata Bhattacharya
Feb 23, 2019
Basics of Phaco - 2
In Part 1 we discussed about two basic pump systems and the footswitch positions. Against the backdrop of these information let us now...
Subhabrata Bhattacharya
Feb 23, 2019
Basics of Phaco - 1
Ever since the introduction of Phacoemulsification in 1967, till today, the fundamentals have all remained the same. The three basics...
Subhabrata Bhattacharya
Feb 23, 2019
Keratoconus Classification & Indices
Classification or grades of keratoconus
Subhabrata Bhattacharya
Jan 22, 2019
Thoughts on TORIC IOL for a fairly irregular Cornea
When can we choose a TORIC IOL for a fairly irregular cornea. It is critical to look into the central 3 to 4 mm zone of the cornea
Subhabrata Bhattacharya
Jan 3, 2019
What to do when your Keratometry readings are different from different Keratometers
When your different keratometry machines give different values of the corneal power of the same patient use the Barrett K calculator.
Subhabrata Bhattacharya
Dec 6, 2018
Centroid SIA calculation - ASCRS website
This article is in continuation to my write up in this blog ‘The Why & What of Centroid SIA involving astigmatism correction’. I would...
Subhabrata Bhattacharya
Nov 28, 2018
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