Knot or lump under skin under dogs eye

O my dog has a knot or a lump under the skin under his eye don't seem to be affecting his sight but we already know he's kind of blind in that eye on one side no pain when touched slowly gets bigger with size over time

I'm sorry to hear about your dogs' eye.

• This could be a skin lump, benign or cancerous; however, I am not sure why it is making him blind in this case, unless it is physically getting in the way or pushing on the eye's surface.
• It could be a stye, abscess or similar
• It could originate in the tear-duct.  There is a relatively new worm, called Thelazia, most common in but not limited to imported dogs, that can block the tear-duct and cause a lump.
• It could be what's known as a 'cherry eye'; dogs have a red, wet, third eyelid that runs from the inner corner (deeper than the two more familiar eyelids).  This moist, red eyelid contains a lump of glandular tissue and in some dogs, the third eyelid slips out of place and the gland prevents it from sliding back into the corner; this often presents as a a pink lump at the inner corner of the eye.  In this case, the abnormal gland can lead to the eye becoming too dry and even to blindness - so it should be well managed.

I'm sure that there are also plenty other possibilities.  I don't know how long it has been there, but with any new eye problem, we'd would recommend that you speak to your emergency vet for the case to be triaged.

We just had our dog to the vet for tooth abscess and said it could cause a lump under eye. Does dog have foul smelling breath and eating properly which could be a sign of tooth abscess. But as Liz posted there is just too many things it could be.Good advice from Liz about being time to see a vet. Best of luck