Cataracts sit on the bilateral list, and inherited cataracts usually do develop in both eyes, though rarely at the same time. That gap is the trap: the second eye clouding two years after the first is, under most of these definitions, the same condition rather than a new one. Where a policy also excludes hereditary conditions outright, an inherited cataract can fall outside cover on two separate grounds at once.
What is clouding of the lens, in plain terms?
The lens inside the eye clouds over and light stops reaching the retina. In dogs it is often inherited and can appear in young animals, and it is also one of the commonest complications of diabetes. A dense cataract blinds that eye. Surgery to remove the lens works well and is among the more expensive procedures in veterinary ophthalmology, which is precisely why the wording around it repays reading.
At what age does it usually appear?
It depends entirely on the cause, which is why this one resists a single answer. Inherited cataracts can appear in a dog of one to three years. Diabetic cataracts come on fast, sometimes within weeks of the diabetes itself, and can blind a dog almost overnight. Age-related clouding shows up from about eight. The first sign an owner notices is usually bumping into furniture in dim light rather than any visible change to the eye.
Which clause should you check before you buy?
Check the hereditary clause and the bilateral clause together, because an inherited cataract can be caught by both at once and the two are usually in different parts of the document. Then check whether the policy covers the underlying disease as well as the eye: a diabetic cataract is a complication, and a policy that excludes the diabetes may decline the surgery that follows from it. If your dog is over eight, also check any upper age limit on new enrolment, since that is where age-related cataracts land.
Do insurers treat both sides of the body as one condition?
Named as a bilateral condition in Trupanion policy form TRU-00001 (08/11), Definitions 7.c; read 2026-09-01
Cataracts: how long before an insurer will pay for it?
Also called clouding of the lens. Each insurer's waiting period and second-side rule below, from its own policy document.
Which insurer covers clouding of the lens soonest, and which makes you wait?
Cataracts falls under the ophthalmic class at most US insurers. The table below gives each insurer's waiting period and its rule for the second side of the body, taken from the insurer's own policy document.
| Insurer | Waiting period | Second side of the body | Hereditary and congenital | Where it says so |
|---|---|---|---|---|
| Figo | 14 days Fourteen days for illnesses generally. Anything that occurs during the waiting period is excluded afterwards as a pre-existing condition, which is the standard mechanism in this market. | Not stated in the document | Covered | Definitions 44, Waiting Period, page 3 of 13; What We Cover, Illnesses including Genetic Conditions, page 4 of 13 |
| Lemonade | 14 days 14 days for illnesses. Waiting periods can be waived after a comprehensive vet exam plus a Waiting Period Waiver Form submitted within 2 days, but anything found at that exam may then count as pre-existing. This policy defines a Bilateral Condition as a chronic condition affecting both sides; that is a test on the condition, not on illness as a class, so no bilateral rule is recorded here. | Not stated in the document | Covered | Waiting periods; Pre-existing conditions; Definitions page 14 |
| Spot | 14 days The same 14 day waiting period applies to illnesses, and Exclusion f makes anything that occurs during a waiting period a pre-existing condition. On the second side of the body this policy has two mechanisms and only one of them bites. Exclusion c removes cover for "bilateral conditions of pre-existing conditions", which needs a pre-existing condition to already exist. The clause that turns one side into a pre-existing condition for the other names ligament, patella, meniscus and knee soft tissue, and illness in general is not in that list. | Not stated in the document | Covered | WAITING PERIODS, page 4; Definitions, Bilateral Condition, page 2; Exclusions c and f, page 5 |
| Trupanion | 30 days No separate ophthalmic waiting period is stated in this specimen; it falls under the general 30 day illness waiting period. | Second side counts as pre-existing | Not stated in the document | Waiting period at 5.b(2), page 3 of 9; bilateral exclusion at 5.c(2), page 3 of 9; definition at 7.c, page 6 of 9, which names cherry eye, entropion/ectropion and cataracts |
The waiting period for clouding of the lens is the number that decides whether a claim in the first year is paid at all, and it is the figure insurers vary most quietly. Each row below states the section of the policy it came from.
Every row cites the policy form code and the section it was read from, with the date we read it. Oldest check date on this page: .