StemCell Therapy

re: "wish there is some way to emulate the vision under different types of settings"

If you do get the Crystalens set for distance and it doesn't provide enough near vision, then you can try some of the options I mentioned above like multifocal contacts, or a corneal inlay (which can be taken out if it doesn't work). Coincidentally,the Kamra inlay was just approved in the US by the FDA yesterday (I see you are in the US, unlike the prior poster). Itsbeen available elsewhere for quite a while. The Raindrop inlayis still in the approval process, but is available elsewhere. I will note that both of those have evolved over time, so if you look for studies the recent ones may be better due to improvements.

How much near vision you get will depend on your eyes, a tiny fraction of people have enough natural depth of focus in their eyes that even with a monofocal they are able to read some without correction, but it is best to plan based on average results.

If you are concerned about getting enough intermediate or near vision if the lens doesn't accommodate much,and don't mind wearing correction for driving, then you could consider getting the Crystalens set for some intermediate distance, e.g.if you set yourself for 0.5D myopia that would be focused at around 2 meters, so that even if it doesn't accommodate, that would give you usable vision for around the household and at computer distance. Setting it a bit closer would ensure even better computer distance and perhaps some reading, e.g. 1D is focused at 1 meter, 1.5D = 66.7 meters = 26.2 inches which is around computer monitor range for many (laptops might be a bit less).This page explains what diopters translate to what focal distance:

https://www.slackbooks.com/excerpts/67956_3.pdf

Studies on lensestry to evaluate the average visual acuity at different distances (with the distances measured in diopters, though sometimes the distance in cm added) which lets you compare lenses. The graphs are called defocus curves, and are explained in this article:

http://crstoday.com/2010/11/feature-story-get-to-know-the-defocus-curve/

For example if you look on this site, and click on the "clinical" tab:

http://www.tecnisiol.com/eu/tecnis-symfony-iol.htm

You will see a defocus curve for the Symfony lens, but the graph also shows the curve for a Tecnis monofocal to see what those are like(though not all monofocals are equal, I don't know how well the Crystalens does as a monofocal if it doesn't accommodate, I hadn't searched for that).

Originally posted here:
How is your vision after Cataract Surgery? - Eye Care ...

This entry was posted on June 8, 2015 at 3:49 pm and is filed under Eye Sight & Vision. You can follow any responses to this entry through the RSS 2.0 feed. Both comments and pings are currently closed. |