Even with commercial washing and inspection, small clusters may occasionally remain hidden between folded or tightly packed leaves. This can happen with conventionally grown and organic produce alike because insects are a normal part of agricultural environments. Discovering eggs does not necessarily mean the entire product is dangerous, but it does indicate that the affected leaves were not fully cleaned before reaching the plate.
If you notice anything unusual while preparing greens at home, discard the affected leaves and inspect the rest carefully. Separate the leaves and rinse them thoroughly under clean, cold running water while gently rubbing the surfaces. When eating at a restaurant, notify the staff immediately, request a replacement, and take a photograph if you need to document the incident. The eggs themselves are usually more unpleasant than dangerous, but they should not be intentionally eaten.
The best protection is to inspect fresh produce before serving it, including items labeled pre-washed or ready to eat. A quick glance and careful rinse can help remove dirt, insects, and other visible contaminants, although washing cannot guarantee complete removal of every microorganism. Finding insect eggs in a salad is certainly unsettling, but it is generally a reminder to examine leafy vegetables carefully rather than a reason to panic.