The use of Nardostachys jatamansi (commonly called spikenard or "Jatamansi") for eye problems is primarily rooted in traditional medicine, especially within Ayurveda and some Unani medical texts. Historically, various texts have described preparations containing Nardostachys as being beneficial for "eye health," "improving vision," or treating nonspecific "eye disorders." The plant is said to have cooling, anti-inflammatory, and calming properties that theoretically could help with eye strain or irritation. However, these claims are based on centuries-old practices and anecdotal evidence rather than rigorous scientific evaluation.

When it comes to modern research, there is a near-total lack of direct scientific studies investigating the use of Nardostachys specifically for eye diseases or visual function in humans or even in animal models. Most contemporary research focuses on its potential CNS effects, such as neuroprotection, anti-anxiety, and antioxidant activity. While these effects could, in theory, contribute to general health and possibly indirectly benefit ocular tissues, there is no direct scientific validation for its use in treating or supporting eye problems. Thus, the evidence supporting the use of Nardostachys for eye issues remains traditional and is rated as very weak (1/5).