Protecting your horse's eyes—what you need to know, our recommendations

CONTEST: SHARE YOUR EXPERIENCE WITH EQUIDIVA

August 18, 2026

Win 10 €30 gift cards to use on your next order (valid for 12 months)!

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Heat Waves and Equine Eye Health: An Often-Underestimated Risk

July 9, 2026

Heat Waves and Horses: Learn how extreme heat affects eye health and how to effectively protect your horse's eyes during the summer.

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Which herbal remedy should I choose based on my horse's condition?

February 23, 2026

Herbal medicine for horses with sensitive eyes: UV protection, support for uveitis or eye inflammation, and relief from seasonal eye irritation.

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Horse Medical Training: Care Training Explained by Caroline Raillard

December 9, 2025

Discover how Medical Training can make it easier to provide eye care for your horse. Tips from a specialist, video resources, and workshops to help you learn the techniques.
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Monitor the UV index: protect horses' eyes all year round

October 21, 2025

Even in fall or winter, UV rays can damage the eyes of sensitive horses. Keep an eye on the UV index and adjust their eye protection accordingly.

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How can I tell if my horse is bothered by the light?

October 7, 2025

Horses can be greatly bothered by bright light, especially those with sensitive eyes or certain conditions such as uveitis. Identifying this disorder is essential to ensuring your horse's comfort and preventing health problems from worsening.
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Which work goggles should I choose for my horse?

July 18, 2025

Does your pony or horse need eye protection at work? There are two solutions available: eVysor and equigoogs. But what are the differences? 

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How can recurrence of uveitis in horses be prevented?

March 22, 2025

Recurrent uveitis is a common condition in horses, causing repeated inflammation of the eye. This disease can lead to vision loss if not treated effectively. It is essential to implement preventive strategies to minimize the risk of recurrence.

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Conjunctivitis in horses: causes, symptoms, prevention

January 28, 2025

Conjunctivitis is a common condition in horses, causing pain and discomfort. It is crucial to identify it as early as possible so that it can be treated promptly to avoid complications. Find out about the causes and symptoms of conjunctivitis in horses and what you can do to prevent it from occurring.
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The impact of climate change on horse health

July 2, 2024

Heat waves, droughts, torrential rains—climate change has consequences for human and animal health as well as biodiversity. Horses today suffer from disorders and diseases that are directly attributable to climate disruption.

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What is headshaking or incense burning in horses?

April 15, 2024

Headshaking, or head shaking, is a highly debilitating condition that greatly hinders riding and can even affect the relationship between rider and horse. This disorder requires thorough investigation in order to restore the animal's quality of life and harmony with its rider.
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Should you clean your horse's eyes?

January 15, 2024

Why and how to clean your horse's eyes, what equipment to use, what signs should prompt you to call the vet: all our practical advice for good eye health for your horse.
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What size should I choose for my Equidiva mask/hat?

All measurements are approximate and are provided for informational purposes only.

Size guide - Premium or Helios mask

Using a tape measure (or a piece of string that you will measure afterwards), measure around your horse's head as shown in the photo:


Mask size Head circumference
XS - Shetland* 84 cm
S - Pony* 90 cm
M - Cob* 94 cm
L - Full* 100 cm
XL - XFull* 110 cm
If your horse's head measurement falls between two sizes, we recommend choosing the larger of the two.



Size guide - Equivizor masks (Lightweight, Arso, Convalescence models)

For these masks, the main measurement is the width of your horse's forehead. To do this, you need to add together three measurements:

  1. Start at the outer corner of one eye and measure upwards at a slight angle to the middle of the forehead (measurement A).
  2. continue along the front of your horse(measurement B),
  3. Finish the measurement by directing the line slightly downward to the outer corner of the other eye (measurement C). This way, you will measure the widest part of your horse's forehead.

Add these 3 measurements (A+B+C) to obtain the size of your horse's forehead.

IMPORTANT: Do not measure directly from one eye to the other, as this will likely result in an inaccurate measurement.

equivizor mask measurements

Mask size Forehead size
XS - Shetland* 7.5–8.7 inches
S - Pony* 8.7–11.4 inches
M - Cob* 11.5–13.5 inches
L - Full* 13-14 inches
XL - XFull* 15-17 inches


Size guide - Rambo mask

Take these 3 steps:


Size A B C
XS (large Shetland) 60 cm 84 cm 20 cm
S (pony) 70 cm 96 cm 9.5 inches
M (cob) 70 cm 96 cm 9.25 inches
L (full) 75 cm 105 cm 27 cm

If your horse is between sizes, we recommend choosing the smaller size.


Size guide - Equivet mask

Measure the distance between the center of the horse's two eyes:


Mask size Distance between the eyes
S - Pony* 18 cm
M - Cob* 21 cm
L - Full* 9.5 inches
XL - XFull* 26 cm


Size guide - eVysor glasses

The eVysor mask is available in one size. It is suitable for horses in the "cob"* or "full"* size ranges. It may also fit large ponies (D-class ponies).
evysor measurement

* Vocabulary Notes
XS = generally a small-headed pony
S = generally a pony / some horse foals
COB : generally a small horse / compact head
FULL : generally a standard-sized horse
XFULL = generally a large-headed horse or a small draft horse

Did you make a mistake? Exchanges are always possible, and we'll process them as quickly as possible, provided you notify us within 14 days.
> See the return policy