Yes, vision changes, particularly temporary changes in color vision (such as seeing a blue tinge to objects or having difficulty distinguishing between blue and green), are among the known side effects associated with the use of sildenafil citrate, the active ingredient in Vigora 100 mg and similar medications used to treat erectile dysfunction.

In rare cases, more serious vision changes, such as decreased vision or sudden loss of vision, have been reported. These adverse effects are typically associated with higher doses of sildenafil or underlying medical conditions.

If you experience any vision changes while taking Vigora 100 mg or any medication containing sildenafil citrate, it's essential to seek medical attention promptly. Additionally, if you have a history of vision problems or eye conditions, it's important to discuss this with your healthcare provider before starting treatment with sildenafil or any similar medication. They can help assess the risks and benefits and provide guidance on the best course of action for your specific situation.