## 4 Discussion
These drugs were effective particularly in the early treatment of experimental corneal burns. [PERSON] et al. described a favorable effect of subconjunctival injection of triamcinolone after corneal alkali burns in rabbits [26]. Triamcinolone was very effective for the treatment of acute ocular burn because it reduced the corneal inflammatory process, opacity, and vascularization. It was also checked in transdifferentiated bone marrow or hair follicle stem cells [27]. One therapeutic option is to use drops from the patient's own serum. Human serum contains a physiological plethora of bioactive elements naturally released by activated platelets, which might have a significant effect on the regeneration of corneal layers by stimulating cell growth [28]. Calf blood dialysate is also used to accelerate wound healing of the skin, mucosa, and cornea (Solcoseryl) [29]. The effect confirming the regenerative properties of the substance is the acceleration of the growth rate of the corneal epithelium compared to the control group. The turned-over of epithelium cells could approximate from 7 to 10 days. Although multiplication and acquisition of human-derived maternal cells is possible and has good therapeutic results, it is expensive and requires constant cooperation with the cell culture laboratory. Standardization of such obtained cells is also problematic. An additional obstacle of the above-mentioned cellular therapies is the necessity of many days of hospitalization of the treated patient. These problems are solved by administering standardized stem cells in eye drops grown from deer antlers. Multiplied laboratory stem cells are used to treat corneal damage. They may come from a healthy eye, the same patient, the same donor, as well as from the oral mucosa [30]. Proven usability of bulge-derived, immature dental pulp, umbilical cord, induced pluripotent, mesenchymal, or embryonic stem cells are successful in the treatment of corneal lesions. In 2020, [PERSON] et al. adipose-tissue-derived stem cells were used to treat model rabbit \(n\)-heptanol corneal injury [31]. They proved that ocular surface reconstruction can be improved by using applied stem cells. Corneal wounds can be angled by using maternal cells from the intact eye. [PERSON] et al. applied autologous limbal epithelial cell transplantation improved after corneal injury with alkaline [32]. Long-term observation of the effects of limbal stem cell treatment on corneal damage with heptanol showed that the corneal healing effect persisted even after one year [33]. In the conducted experiment, we noticed a statistically significant increase in the mean thickness of the anterior corneal epithelium for the group treated with the homogenate of deer antler stem cells. For the homogenate group, it was the mean value of 19.2, compared to the value of 15.2 in the control group. It should also be emphasized here that there were no statistically significant differences in epithelial thickness between the homogenate and Solcoseryl groups. One idea for a new therapy is trying to use stem cells from the antlers of the deer _Cerus elaphus_[1]. The renewal of the corneal and regeneration is mediated by the limbus stem cells that are located in the thick zone between the bulbar conjunctiva and the cornea [34]. Recent research has proven that the regenerative action of deer stem cells is connected with pleiotrophin as a multifunctional growth factor [35]. [PERSON] et al. proved that deer antler cells belong to a novel type of cells that sustain full regeneration of mammalian organs [36]. There are the apparent lack of any specific \"antlerogenic molecular mechanisms\" suggesting that the secret of deers' ability to regenerate antlers lies in the particular cues to which multipotential progenitor/stem cells in an antler's \"regeneration territory\" are exposed.