The patient is 70 years old and the corneal scar of the left eye is about 80% depth within the … More
Category: IOL calculations
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
Temporal vs Superior Phaco Incisions
[Click link below for full video] Some surgeons prefer to make a superior phaco incision while others prefer a temporal … More
Should you do a Primary Piggyback IOL?
In highly hyperopic eyes and nanophthalmic eyes the required IOL power can be very high, sometimes in excess of +40 … More
Cataract Surgery in Small, Hyperopic Eyes
Small eyes make cataract surgery more difficult in many ways: there is less working room in the eye, the IOL … More
Cataract Surgery with a very shallow Anterior Chamber
This small eye suffered from angle closure and subsequent development of a white cataract. The angle closure was successfully treated … More
Cataract Surgery Technique in Highly Myopic Eyes
We have previously featured an article about doing cataract surgery in these highly myopic eyes, so we will focus on the surgical … More
Choosing Refractive Targets to maximize Depth of Field
From this photo it is obvious that the aperture size of a camera makes a large difference in the depth … More
Step-by-Step Technique for Toric IOLs
Toric IOLs can provide the added benefit of addressing astigmatism at the time of cataract surgery. They are available in … More
The Rule of Nines for Sulcus IOL Power
From CataractCoach.com: With newly developed methods of IOL power calculation, we are approaching 90% or higher accuracy of achieving +/- … More
Plano may not be best refractive outcome for every patient
Some patients may benefit from a small degree of residual hyperopia, myopia or astigmatism. There is a pride that we … More
Artificial Intelligence in IOL Calculations
Evolving IOL Calculations with Artificial Intelligence. (Watch Video Below) An experienced cataract surgeon has developed an intuition after having done … More
Cataract Surgery after Radial Keratotomy
This patient was very myopic and desired surgical correction many years before the advent of the excimer laser. As such, … More
Cataract Surgery and Pterygium Avoidance
(scroll down to see the full narrated surgical video) In most patients who have both a pterygium and a cataract, … More
Cataract Surgery with Prior LASIK
With age, everyone who lives long enough will develop a cataract. This means that today’s LASIK patients will someday need … More