Thank you for your question fo013. I understand your concern. Botox is a purified protein used to address wrinkles associated with facial expression. When injected into the skin Botox will relax the muscles and smoothen out the overlying wrinkles. The most common areas of treatment are in the upper face. These include the horizontal lines seen on the upper forehead when one raises the brows, the vertical lines seen between the brows when one frowns (frown lines), and the crow's feet seen around the eyes when one smiles.It is difficult to make an assessment without a formal exam in the office where I can view the skin in multiple angles and observe wrinkles formed with facial expression. However, I hope the information provided here is useful.In addition to addressing various wrinkles, Botox can also be used to adjust the position and shape of the eyebrows. It works the same way as it does when addressing wrinkles, namely by relaxing muscles. In the upper forehead, there are muscles that move the eyebrows up and other muscles that move the eyebrows down. The muscle that moves the eyebrows up is on the upper forehead; this is called the frontalis muscle. It is responsible for the horizontal lines seen on the upper forehead when one raises the eyebrows. The muscles that pull down on the eyebrows are located between the eyebrows and at the corners of the eyebrows. The muscle group between the eyebrows is called the glabellar complex. There is another muscle that goes around the entire eye called the orbicularis oculi muscle. The portion of this muscle under the tail of the eyebrow is responsible for pulling down on the tail of the eyebrow. When any of these muscles is relaxes with Botox the position of the eyebrow can be adjusted. When treating the horizontal lines on the upper forehead seen when one raises the eyebrows, if the dose is too high or if the placement of the product is too low it can lead to the feeling of a heavy eyebrow, difficulty raising the eyebrow, or downward movement of the eyebrow. This can also lead to downward movement of the eyelids, making a person appear tired. It also can make it difficult to apply eye makeup. To correct this Botox is placed in the antagonistic muscles, those in the glabella and orbicularis oculi which pull down on the eyebrows. This will raise the position of the eyebrows. These two areas can be treated with Botox to provide a brow lift. To do so 4-20 units of Botox are used in the glabella between the eyebrows and 2-12 units of Botox per side are used at the tail of the brow and/or the entire crow’s feet region.The muscles that are treated with Botox around the eyes are close to the muscle that lifts the upper eyelid. If this muscle is affected it can lead to a temporary droopy eyelid (blepharoptosis). The duration depends on the placement of the product and the dose used. Usually it resolves in 2 weeks, but it can last up to 4 months. Blepharoptosis can be treated with apraclonidine 0.5% ophthalmic solution (also known as iopidine) and various other medications. For my patients, I recommend 2-3 drops to the affected eye 2-3 times per day. When the blepharoptosis begins to wear off patients notice less of a droop when waking up in the morning after the last dose of apraclonidine has worn off. The incidence of blepharoptosis is reported to be approximately 1% but in my experience, I find it to be about 0.1%. This is likely due to the fact that when these studies were initially performed injectors may have not been as aware of this adverse effect nor been taking extra precautions to avoid it. Blepharoptosis occurs when Botox is placed near the eye and it diffuses to the muscle that lifts the upper eyelid (levator palpebrae superioris). This is located inside of the orbital rim above the globe. To avoid this side effect, I place the product at least 1 cm from the orbital rim. When placing product between the brows I pinch the area to be treated and lift it so that the product is placed in the muscle and is less likely to diffuse around the bone into the orbital space. Diffusion into this area may also be caused by other preventable things. For this reason, I recommend that my patients carefully follow the simple aftercare instructions described below. This may be a reason for the low incidence of side effects in my practice.If I had a patient with the concern described here I would say that the Marcus Gunn syndrome would likely not affect a Botox treatment.With any injection, there are risks such as pain, bleeding, bruising, redness, swelling, tenderness, and infection. We take special precautions to minimize these risks such as using a painless technique. We also treat bruises with a laser as early as the next day. Bruises usually resolve within two weeks if untreated. After a laser treatment bruises usually resolve in 1-3 days, but may still take two weeks for full resolution. In addition to these risks, with Botox there is also a risk that the product spreads or diffuses to nearby structures. Spread to nearby muscles can lead to side effects such as the temporary appearance of droopy eyelids or a temporary asymmetric smile.
