Entropion in Cats Unlike in dogs, entropion is a fairly rare condition in cats. Typically cases affect two broad age groups – young cats (few years o

Entropion in Cats

Unlike in dogs, entropion is a fairly rare condition in cats. Typically cases affect two broad age groups – young cats (few years old) and old cats (over 12 years). Entropion in young cats appears to be due to eyelid conformation, such as overly long eyelids or a very flat face. Some cases can occur after corneal trauma or ulceration. In older cats, entropion can follow weight loss; loss of retrobulbar fat results in sinking of the eye backwards into the socket, then inward rolling of the lower eyelids.

Different types of entropion in cats:

Lower lateral entropion (most common) – seen in young and old cats
Lower medial entropion (most common in flat-faced breeds such as Persians, Exotic Shorthairs)
*Upper medial entropion (e.g. Persians)

entropionvasc

Lower Lateral Lid with vascularisation

 
Entropion

Lower Lateral

 
Seques early

Early Sequestrum

Surgical correction

Surgery is required to remodel the eyelid so that it no longer rolls in. Lower lateral eyelid entropion is the most common entropion seen in cats at Animal Eye Care. In the past we used to perform a lower eyelid shorten and rollout however these cases had an unacceptable recurrence rate, usually several years later. Our current technique aims to permanently stabilise the lower eyelid with a lateral canthal closure of 3mm and a lower eyelid rollout. We place a temporary tarsorrhaphy suture adjacent to the newly created lateral canthus to relieve any tension from the sutures. It is important to remove the correct amount of skin from the lower eyelid to ensure cosmesis and normal return of function. We use 5/0 Maxon or Vicryl Rapide suture however 6/0 Vicryl Rapide is also acceptable. A simple interrupted pattern should be used and the suture ends cut short.

In young and old cats that present unilaterally, we always consider that the fellow eye is predisposed to entropion. It is our experience, especially in old cats, that the fellow eye will develop entropion at some stage in the near future. For this reason, we always recommend a lateral canthal closure of the fellow eye, even if it is not rolling in.

Corneal sequestration

Cases of feline entropion of short duration rarely develop corneal sequestration. The likelihood of corneal discolouration occurring increases the longer the entropion has been present. Generally a superficial ulcer develops and discolouration and often vascularisation follow. A superficial keratectomy is required to excise the discoloured cornea prior to correction of the entropion. The cornea can then be covered by a third eyelid flap or temporary tarsorrhaphy suture.

Doxycycline antibiotics are recommended for 7-14 days postoperatively at a dose of 2-5mg/kg BID.

In our experience, once the entropion is corrected and the corneal sequestrum is removed, we have few ongoing problems with the cornea. When corneal sequestration accompanies entropion in Persians or Exotic Shorthair Cats, a conjunctival pedicle graft may be required.

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