Non-Mydriatic vs Mydriatic Fundus Cameras for Clinical Use

What Is the Difference Between Non-Mydriatic and Mydriatic Fundus Cameras?

A non-mydriatic fundus camera is designed to capture retinal images without routine pupil dilation. Mydriatic imaging is performed after dilating drops are used to widen the pupil when a clearer or broader view is needed.

Some people can have the photo taken without any drops. For others, a small pupil gets in the way and the picture just isn’t good enough. The doctor may use drops, wait for the pupil to open, and take the photo again. It takes a little longer, and close-up vision can stay blurry for a few hours. Bright light may feel uncomfortable too.

	Non-Mydriatic Imaging	Mydriatic Imaging
Dilating drops	Often not needed for routine photography	Used before photography
Waiting time	Imaging can usually begin right away	Time is needed for the pupil to dilate
Small pupils	May make imaging more difficult	A larger pupil can make the view easier
Image quality	Depends on pupil size, media clarity, positioning and camera performance	Dilation can help when an undilated image is difficult to capture
Patient experience	No temporary dilation for many routine images	Temporary light sensitivity or blurred near vision may occur
Common use	Routine photography, screening and faster imaging workflows	When an undilated image is inadequate or dilation is clinically needed

One thing that can be confusing is that non-mydriatic and handheld are not the same thing. A camera can sit on a table and still work without dilation. A handheld camera may also be non-mydriatic. They are simply describing two different things: whether drops are usually needed, and how the camera is used.

Comparison of non-mydriatic and mydriatic fundus imaging workflows, showing immediate retinal imaging versus pupil dilation with a waiting period.

How Does a Non-Mydriatic Fundus Camera Work?

With a non-mydriatic camera, the photo is taken through the pupil without using dilating drops first. While the eye is being lined up, many cameras use infrared or dim light. Once the image looks sharp and the eye is in the right spot, the camera takes the color photo.

How much work the operator has to do depends on the camera. Some need more hands-on focusing and positioning. Others help with autofocus or guides that show when the eye is lined up. That can be useful when different people in the clinic are using the same machine.

The camera is only part of it, though. Small pupils, cataracts, eye movement, eyelashes, glare, or being a little off-center can all spoil the picture. If the doctor cannot clearly see the area they need, the photo may be taken again. Sometimes dilation is needed after all.

Diagram showing how a non-mydriatic fundus camera uses the natural pupil for alignment and captures a color retinal image without routine dilation.

When Does Non-Mydriatic Imaging Work Well?

If the camera can get a good picture without dilation, there is no need to wait for eye drops to work. The photo is taken, checked, and the patient can move on with the visit. That is helpful in busy clinics or screening programs where a lot of retinal photos are taken every day.

Diabetic eye screening is a good example. The photos can be taken first and looked at later by the doctor or another trained reader. This is also useful when the pictures are taken in one place and reviewed somewhere else, such as in primary care clinics or community screening programs.

The camera does not always have to stay in one room either. A portable camera can be carried from room to room or brought to the patient. A handheld camera may also be easier for someone who has trouble sitting in front of a tabletop machine.

For many patients, drops are not needed at all. If the first photo is clear, that is usually enough. If it is not, the eye can still be dilated and the photo taken again.

When Is Pupil Dilation Still Useful?

Sometimes the first photo just doesn’t work. The image may be too dark, blurry, or missing part of the retina. A small pupil or cataract can be behind it. If repeating the shot doesn’t help, the next step may be to dilate the pupil.

Dilation may also be useful when the clinician needs to look farther into the retinal periphery. A fundus photograph is not the same as a complete dilated retinal examination, and a camera's field of view still determines how much retina appears in a single image.

For that reason, the more useful question is not:

Can this camera work without dilation?

It is:

Is the undilated image good enough for what we need to see?

A simple clinical workflow can look like this:

1. Take the fundus image without dilation.

↓

2. Is the image clear and does it show the retinal area needed for the exam?

Yes → Continue with the non-mydriatic image.

No → Check focus, positioning, pupil size and media clarity.

↓

3. Is the image still poor, or is a broader retinal view needed?

Yes → Consider dilation or another retinal examination.

Whether dilation is needed can change from patient to patient. One person may give a clear undilated image, while another may still need dilation even with the same camera.

Illustration showing situations where non-mydriatic fundus imaging may require dilation, including small pupils, cataracts, poor image quality, and the need for a wider peripheral view.

Handheld, Portable, and Automated: What Do These Terms Mean?

A fundus camera can fit into more than one category. A handheld camera, for example, may also be portable, non-mydriatic, and have autofocus. These words are just describing different features of the same camera.

That is why two non-mydriatic cameras can still be very different to use. One may stay in one room and do most of the setup automatically. Another may be handheld and moved from room to room or brought to the patient.

Both may take retinal photos without dilation. The main difference is how the camera is used and how much the operator has to do.

Comparison of tabletop and handheld non-mydriatic fundus cameras, showing a fixed automated clinic system and a portable handheld device used at the patient’s side.

What Should a Clinic Compare Before Choosing?

Before comparing spec sheets, think about how retinal imaging actually happens in your clinic. If most patients can sit comfortably at one fixed imaging station, portability may not add much. But if staff move between rooms or you often see patients who struggle with positioning, a handheld camera may be easier to work with.

Then look at the images you are getting in everyday use. How often does the photo need to be repeated? Can staff still get the optic disc and macula into focus when the pupil is small? Field of view is another thing to check, but it is separate from dilation—a non-mydriatic camera is not automatically a widefield camera.

Who uses the camera matters. In some clinics, one tech takes most of the photos. In others, several people may use the same camera. If that is the case, autofocus and simple alignment help can save a lot of trouble. It also helps if the photo can be checked right away. If it is blurry or badly framed, the operator can just take another one.

Prices can be very different. “Non-mydriatic” does not tell you whether the camera is a small handheld unit or a large tabletop system. Both can use that name, but they may cost very different amounts. Software, automatic features, image transfer, service, and support can also add to the price.

Searches for the best non-mydriatic fundus camera often bring up devices that are designed for completely different clinics. Before choosing one, ask:

Can our staff get a clear image without several retakes?
Does it work well with the patients we usually see?
Is the field of view enough for the images we need?
Does it fit the way patients move through our clinic?
Is it easy to review, save, and transfer the images?
What do we do when the undilated image is not good enough?

Frequently Asked Questions

Can non-mydriatic imaging eliminate the need for dilation?

For some patients, yes. If the picture is clear without drops, there may be no reason to dilate. But if the pupil is small or the doctor needs a better view, dilation may still be used.

Is a non-mydriatic retinal camera the same as a fundus camera?

In most cases, yes. “Retinal camera” and “fundus camera” are often used to mean the same thing. Non-mydriatic just means the camera can take photos without dilating the eye first.

When might dilation still be needed?

If the camera cannot get a clear enough picture. This can happen with a small pupil, cataract, or when more of the outer retina needs to be seen.

What affects non-mydriatic fundus camera price?

It depends on the type of camera and what comes with it. Handheld and tabletop models can be priced very differently. Software, autofocus, warranty, and service also make a difference.

What should clinics look for in the best non-mydriatic fundus camera?

See how it works in your own clinic. If staff can get a clear photo without a lot of adjusting or retakes, that matters more than having a long list of features.