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

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

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

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

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

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

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

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