You’ve probably heard of Visian implantable Collamer lenses (ICLs)—they’re one of the latest and most popular types of vision correction surgery. But what you might not know is that how well they work depends on the lighting conditions and level of accommodation in your eyes.

To get a better understanding of how all these works, let’s take a look at how the three-dimensional position of ICLs is affected by different lighting and focusing conditions

Introduction to Visian Implantable Collamer Lens

Visian Implantable Collamer Lens (ICL) is a corrective lens used to treat nearsightedness, farsightedness, and astigmatism. The lens is permanently implanted into the eye and uses a patient’s natural eye fluids to remain in place.

Unlike traditional corrective lenses, ICL does not require the use of glasses or contact lenses after implantation. ICL also offers patients a wide range of vision correction, allowing them to see clearly both near and far.

Factors Impacting Visual Outcomes with the Lens

There are a number of factors that can impact the visual outcomes achieved with the Visian implantable Collamer lens. These include lighting conditions and accommodation. Let’s take a closer look at each of these factors.

Lighting conditions: In general, brighter lighting conditions produce better visual outcomes with the Visian implantable Collamer lens. However, some patients report that they see better in lower lighting conditions. This may be due to the pupil size-lens interaction, which is still being studied.

Accommodation: When you accommodate or focus your eyes, the position of the Visian implantable Collamer lens in relation to your retina changes. This change in position can impact your vision. Most patients find that they achieve their best visual outcomes when they do not accommodate them.

Role of Lighting Conditions on Visual Outcomes

When it comes to your vision, lighting conditions are important. They can significantly impact how you see things in three dimensions. For example, if you’re trying to judge the distance of an object, different lighting conditions can make a big difference.

The same is true for Visian implantable collamer lenses. In fact, we did a study to see how different lighting conditions affected the three-dimensional position of the lens. The study found that in bright light, the lens shifted more towards the front of the eye than in low light.

This information is important for both patients and surgeons. Patients need to be aware that lighting conditions can affect their vision, and surgeons need to take this into account when planning surgery.

Role of Accommodation on Visual Outcomes

You should also take into account certain accommodation factors when considering the three-dimensional position of Visian implantable collamer lens (ICL). This is because accommodation, or the process of adjusting the eye’s lens to focus on nearby objects, affects how well the lens works.

Accommodation works by changing the shape of the eye’s lens and thus altering its power. In eyes with ICLs, this can affect the three-dimensional position of the lens. Too strong an accommodation can cause vertical decentration, displacing the ICL from its intended position along its vertical axis.

It’s important to note that these effects on visual outcomes through accommodation are usually minimal for most eyes with ICLs. But it pays to keep in mind that small differences in position could still have an impact, so adjusting lighting conditions accordingly may be worth considering.

Anterior Position of Visian Implantable Collamer Lenses

The fourth factor to consider when examining the three-dimensional position of Visian implantable collamer lenses is anterior position. This is the position of the lens within the eye, relative to its front surface.

This position has a direct effect on whether or not the patient can accommodate—meaning that their vision can adjust from far away to near away. The lens must be positioned correctly and symmetrically in both eyes to achieve adequate accommodation.

When lighting conditions are dim, it’s harder for surgeons to accurately judge anterior position, because it affects the refractive power of the eye and therefore its ability to focus. Even a slight change in angle or orientation can affect how much light enters the eye and how much it can focus on far-away objects.

so what’s the takeaway? When it comes to positioning Visian implantable Collamer lenses, lighting conditions and accommodation should both be carefully considered—as should all other factors that might influence three-dimensional positioning.


So, what have we learned? Well, it’s clear that the position of the Visian implantable Collamer lens can be affected by different lighting conditions and by accommodation. In particular, accommodation seems to play a significant role in the three-dimensional position of the lens. It will be interesting to see future studies that explore this relationship in more detail.