The idea behind intra-operative aberrometry is great: measure the eye in the aphakic state and then you can determine the … More
Category: IOL calculations
1627: follow up from myopia IOL calcs
I trust that you are enjoying our IOL Calc Case Study videos where we go into the details of interesting … More
1602: IOL calc case study 6: high myopia
This patient has a high degree of myopia and also a high degree of corneal astigmatism. The patient wants to … More
1357: biometry for trifocal IOLs
The new generation of diffractive trifocal IOLs such as the Alcon PanOptix and the J&J Tecnis Synergy are able to … More
1251: re-aligning a toric IOL without OVD
Our guest surgeon, Dr Alex Abdo Martins from Brazil, has a very interesting case for us. This patient has a … More
1178: AC IOL orientation & calculations
Anterior chamber IOLs (AC IOLs) are not often used, but there will be a time where just about every cataract … More
1146: the future of IOL calculations
This video features the keynote lecture that John Ladas, MD, PhD gave at the UCLA Jules Stein Eye Institute annual … More
1085: Zero power IOL for ultra myopia
Welcome to my operating room at our Beverly Hills surgery center. In this video we will discuss cataract surgery in … More
1084: toric planning for high astigmatism
Our video today showcases the surgical planning for this patient with a high degree of corneal astigmatism. We will go … More
1073: Why did the AC Depth increase?
This patient had biometry performed in our clinic, using the same machine in 2017 and then again in 2021. Of … More
1056: Let’s talk about my OR cases
Recently, on my usual Beverly Hills cataract surgery day, I had a line-up of a bunch of interesting cases and … More
1037: Trifocal IOL with white cataract
Trifocal IOLs require refractive accuracy. We need to be able to deliver close to a plano outcome without much residual … More
1007: IOL calculations with retinal disease
Today we present a quick review of IOL selection and calculations when performing cataract surgery on patients with retinal disease. … More
highly myopic cataract surgery
These are some of the most rewarding cataract surgeries to perform since we can correct the cataract as well as … More
refractive lens exchange for hyperopia
This 58 year old patient is highly hyperopic, wearing +8.5 D glasses for distance vision and then +11.0 D glasses … More
Future of IOL calculations: AI
In just 5 minutes this video will show you the future of IOL calculations. Imagine if you met someone who … More
Playlist: Cataract Surgery in Myopia
playlist: cataract surgery in myopia
choosing refractive targets
Plano is not always the goal It would seem logical that emmetropia is the ideal refractive state of the eye. … More
Cataract Surgery in Silicone Oil Eyes
Retina surgeons will occasionally use silicone oil to help keep the retina in position during healing and in rare cases, … More
Review: Rule of 9s for Sulcus IOL Power
With newly developed methods of IOL power calculation, we are approaching 90% or higher accuracy of achieving +/- 0.5 D of … More
Ensuring accuracy of A-scan ultrasound
Correlate A-scan & biometry measurements to improve accuracy in IOL calculations. This case shows how disparate measurements can lead to … More
Artificial Intelligence in Ophthalmology
The future is here and John Ladas, MD, PhD gives us a brief lecture about the Rules of the Game … More
Toric IOL planning in a small eye (+29.5 D)
Our main phaco incision will induce astigmatism and multiple variables affect the degree of this change. Larger incisions have more … More
The patient has a surprise for you…
You have scheduled a patient for cataract surgery and the case seems relatively routine. The biometry was good and the … More
Review: IOL calcs in high hyperopia
Here is your challenge. You’re operating on a patient who is highly hyperopic (wearing +6.50 OD and +7.00 OS for … More
Why implant a zero power IOL?
This patient is ultra-myopic with an axial length of more than 31 mm. Using the free calculator at IOLcalc.com we … More
What can we learn from the first eye cataract surgery?
The patient had cataract surgery of the right eye two years ago. Initially, she had a plano outcome and great … More
Choosing Toric IOL Steps
For toric IOLs, we need to select the best spherical power as well as the ideal toric step. What is … More
Post-LASIK IOL Power Estimation
In eyes with prior LASIK, many different methods of IOL power estimation have been described to get more accurate results … More
Cataract Surgery in Keratoconus
When a patient has keratoconus, what is different about the cataract surgery? Can you still make your phaco incision in … More
The Most Extreme Myopia that I’ve seen in 20+ years
An average eye has an axial length of about 23 to 24 mm, but this patient had an axial length … More
Switching from a Toric IOL to a spherical sulcus IOL
We recently featured a four-part series of a single, complicated cataract case in which the phaco probe punctured the posterior … More
IOL Calcs: PLUS Precision Ladas Universal Superalgorithm
The future of IOL calculations is with methods that can evolve. A static formula is a time-limited method which will … More
For ultra high myopes, do not aim for plano!
For patients with a large degree of myopia, undergoing cataract surgery can be life changing because in addition to fixing … More
Methods for IOL calculations after prior LASIK
The three main factors in IOL calculations are corneal power, axial length, and effective lens position. Prior LASIK makes this … More
Quiz: Why did we miss the post-op target of plano?
There are many methods of IOL calculations and with every generation, these get more refined and more accurate. Most surgeons … More
What IOL Power do you choose for this patient?
This 60 year old patient is seeing you in consultation for cataract surgery. He has a significant posterior subcapsular cataract … More
Why Lens Geometry is important for IOL Calcs
The geometry of the IOL is important for IOL calculations and it must be taken into consideration. Yet, we learn … More
Learning from the IOL Calcs of the First Eye
Even with the best methods of IOL calculations (new generation formulae, artificial intelligence methods, and more), there will still be … More
IOL Calc Quiz: hitting plano in a high hyperope
Here is your challenge. You’re operating on a patient who is highly hyperopic (wearing +6.50 OD and +7.00 OS for … More
Pearls for Using Multi-focal IOLs (bifocal, trifocal)
For now, among the more reliable ways to address presbyopia is implanting a multi-focal IOL. These are typically diffractive in … More
Why implant an IOL if the power is Zero?
Sometimes, in a very myopic eye, the desired IOL power will calculate to zero diopters. An IOL of zero diopters … More
IOL Calc Quiz: Why are the eyes so different?
This patient has similar cataracts in both eyes and is preparing for cataract surgery with you. The biometry has been … More
IOL Calc Quiz: Why such different results?
A fan of CataractCoach has asked for input regarding the IOL calculations for his patient with steep keratometry. When he … More
Quiz: Should you implant a Toric IOL in this eye?
The patient is 70 years old and the corneal scar of the left eye is about 80% depth within the … More
IOL Calculation Quiz: Ultra-High Myopia
Happy New Year! We are introducing a new feature to CataractCoach.com for 2019: critical evaluation of biometry, IOL calculations, and … More
IOL Calculations in Ultra High Myopia
Most people consider high myopia to be about -10 diopters or greater. We have covered this topic extensively in the … More
IOL Power Estimation after Radial Keratotomy
My technician brought the patient to our biometer (Haag-Streit Lenstar) and it simply would not read the corneal power for … More
Cataract Surgery Challenges with Prior Radial Keratotomy
This patient had prior RK (Radial Keratotomy) done a few decades ago for the treatment of myopia. The patient was … More
Some Simple Ophthalmology Mathematics
Ophthalmology has a large degree of math, particularly when it comes to refractive surgery. Our most commonly performed and most … More